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Rear Diffuser

Adding a more aggressive rear diffuser to your BMW can offer some performance benefits, but is primarily an aesthetic upgrade. BMWs naturally look great from the rear, why not make yours look even better?
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Turner Motorsport Textured ABS Matte Black Diffuser - E36 M3 ...
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Turner Motorsport - Corporate Logo
T#:6258334
Part#: 006706LA10KT
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$ 296.63 USD
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We at Turner Motorsport weren't happy with the current offerings for E36 M3 diffusers, so we decided to create something new!
Turner Motorsport ABS Diffuser - E46 M3
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Turner Motorsport - Corporate Logo
T#:597333
Part#: 028979TMS01
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$ 249.00 USD
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We at Turner Motorsport weren't happy with the current offerings for E46 M3 diffusers, so we decided to create something new! Upgrade the exterior styling on your BMW E46 M3 with the Turner In-House designed and engineered ABS Rear Diffuser. The same style as the Turner Carbon Diffuser, but in a more affordable ABS plastic! Using all factory mounting locations, this diffuser is a direct bolt-on upgrade, that can be installed in minutes. Featuring a deep profile, an aggressive fin design, and extending the entire width of the rear bumper, this exclusive design from Turner Motorsport will be sure to turn heads! Make a bold statement and let your BMW stand out with the Turner ABS Diffuser! Features & Specifications: Diffuser with curvature designed around the E46 M3 body lines Designed in-house using state of the art 3d laser scanning and CAD technology for precision fitment Mounts to existing bumper insert mounting locations with OE hardware Made from lightweight, vacuum-formed ABS polymer, with UV-stabilized gloss black sheet Mimics the lower section of the bumper & OE diffuser lines to accentuate OEM features Mounts to OE clip locations and OE holes on the outer edges of the bumper with supplied, stainless hardware
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Turner Motorsport Smooth ABS Matte Black Diffuser - E36 M3
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Turner Motorsport - Corporate Logo
T#:640267
Part#: 006706LA09KT
In Stock
Sale - Save 10% $ 328.99

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$ 295.70 USD
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We at Turner Motorsport weren't happy with the current offerings for E36 M3 diffusers, so we decided to create something new!

Turner Carbon Fiber Rear Diffuser - F87 M2
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Turner Motorsport - Corporate Logo
T#:639026
Part#: 028530TMS01
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Sale - Save 22% $ 704.99

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$ 549.00 USD
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Upgrade the exterior styling on your BMW F87 M2 with the Turner In-House engineered Carbon Fiber Rear Diffuser. Using all factory mounting locations, this diffuser is a direct bolt-on upgrade that can be installed in minutes. Featuring a deep profile, aggressive fin design, and hand-laid 2x2 pre-preg carbon fiber, this exclusive design from Turner Motorsport will be sure to turn heads!
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Turner Carbon Fiber Rear Diffuser - F8x
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Turner Motorsport - Corporate Logo
T#:584863
Part#: 023241TMS01
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Sale - Save 24% $ 726.99

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$ 549.00 USD
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A beautiful addition to make the rear of your F8X stand out!

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Turner Motorsport Carbon Fiber Diffuser - E46 M3
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Turner Motorsport - Corporate Logo
T#:586814
Part#: 028937TMS01
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$ 478.00 USD
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Upgrade the exterior styling on your BMW E46 M3 with the Turner In-House designed and engineered Carbon Fiber Rear Diffuser. Using all factory mounting locations, this diffuser is a direct bolt-on upgrade that can be installed in minutes. Featuring a deep profile, an aggressive fin design, and hand-laid 2x2 pre-preg carbon fiber, this exclusive design from Turner Motorsport will be sure to turn heads!
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Gloss Black Rear Diffuser - G80/G82/G83 M3/M4
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Turner Motorsport - Corporate Logo
T#:16940491
Part#: 048254LA01KT
Ships in 6 Business Days
Sale - Save 30% $ 525.99

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$ 367.99 USD
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Upgrade the exterior styling on your G80/G82 with our In-House designed and engineered ABS Rear Diffuser. Utilizing factory mounting locations and supplied hardware this diffuser is a direct bolt-on upgrade that can be installed directly in place of your factory diffuser. Featuring a deep profile, an aggressive fin design, and extending the entire width of the rear bumper, our exclusive design is sure to turn heads! Our engineers did an absolutely amazing job on this diffuser from the styling to the fit and finish that is guaranteed to stand out in the market.

Pay close attention to the design characteristics of the diffuser. The emphasized outline of the diffuser adds a whole new dimension to the rear bumper bringing out the beautiful body lines of the G80. By adding an aggressive fin design and boxing around the exhaust exits the rear/side view is almost transformed into a whole new sub model that BMW forgot to offer.

Features & Specifications:

Designed to accentuate the G80/G82 body lines
Perfectly houses quad 4.0" exhaust tips for upgraded and factory exhausts
Designed in-house using state of the art 3d laser scanning and CAD technology for precision fitment
Mounts to existing bumper insert mounting locations with supplied hardware
Made from lightweight, vacuum-formed ABS polymer, with UV-stabilized gloss black sheet
Mimics the lower section of the bumper with added character to amplify OEM features
Product Development:

Our Turner Motorsport Rear Diffuser was designed, engineered, tested and quality inspected by our Research and Development team. We strive for the highest level of precision and quality through leading edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modelling, rapid prototyping utilizing our in-house 3D printer, and rigorous long term product testing.

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Gloss Black Rear Diffuser - G87 M2
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Turner Motorsport - Corporate Logo
T#:21012584
Part#: 050525LA01
In Stock
Sale - Save 54% $ 438.99

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$ 202.08 USD
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Transform the look of your G87 with our Turner in-house designed ABS Rear Diffuser, meticulously crafted for a bold style upgrade. Engineered to seamlessly replace your factory diffuser, this upgrade transforms the rear profile with its striking deep profile and aggressive fin design, exclusively crafted by our engineers at Turner to command attention.

The diffuser's design accentuates the sleek contours of the G87, elevating its aesthetic appeal. Installation is effortless, requiring no modifications. Simply uninstall the current valance, align the tabs, and securely fasten the diffuser into place using the factory hardware and mounting points. Confirm a perfect fit by ensuring tab alignment, then effortlessly secure them with a gentle press for a flawless finish.

Features & Specifications:

Transformative
Designed to accentuate the G87 body lines
Mimics the lower section of the bumper with added character to amplify OEM features
Perfectly houses quad 4.0" exhaust tips for upgraded and factory exhausts
Designed in-house using state of the art 3d laser scanning and CAD technology for precision fitment
Direct fit utilizing factory clip locations and hardware
Crafted from lightweight, vacuum-formed UV-stabilized gloss black ABS polymer
Product Development:

Our Turner Motorsport Rear Diffuser was designed, engineered, tested and quality inspected by our Research and Development team at Turner Motorsport. We strive for the highest level of precision and quality through leading edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modelling, rapid prototyping utilizing our in-house 3D printer, and rigorous long term product testing.

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Turner Gloss Black ABS Diffuser - G20 M340i/xDrive
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Does not fit factory exhaust tips
Turner Motorsport - Corporate Logo
T#:642120
Part#: 008653LA01
In Stock
Sale - Save 19% $ 527.99

This product was last offered at the strikethrough price on
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$ 429.00 USD
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Upgrade the exterior styling on your BMW G20 M340 with the Turner In-House engineered Gloss Black Rear Diffuser. Using all factory mounting locations, this diffuser is a direct bolt-on upgrade that can be installed in minutes. Featuring a deep profile, an aggressive fin design, this exclusive design from Turner Motorsport will be sure to turn heads!
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Turner Carbon Fiber Diffuser - G20 M340i / xDrive
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Does not fit factory exhaust tips
Turner Motorsport - Corporate Logo
T#:642041
Part#: 013748LA01
In Stock
Sale - Save 10% $ 805.99

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$ 725.39 USD
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Upgrade the exterior styling on your BMW G20 M340 with the Turner In-House engineered Carbon Fiber Rear Diffuser. Using all factory mounting locations, this diffuser is a direct bolt-on upgrade that can be installed in minutes. Featuring a deep profile, an aggressive fin design, and hand-laid 2x2 pre-preg carbon fiber, this exclusive design from Turner Motorsport will be sure to turn heads!
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Carbon Fiber Rear Diffuser - G87 M2
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Turner Motorsport - Corporate Logo
T#:30264521
Part#: 050539LA01-01
In Stock
Sale - Save 41% $ 799.99

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$ 475.44 USD
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Upgrade the rear styling of your BMW G87 M2 with the Turner Motorsport Carbon Fiber Rear Diffuser. Specifically engineered for the G87 platform, this carbon fiber diffuser enhances factory body lines with a more aggressive, motorsport-inspired appearance while maintaining a clean OEM+ look. Designed in-house using state-of-the-art 3D laser scanning and CAD technology, ensuring precise fitment and seamless integration with the factory rear bumper, mounting directly to existing locations with no modifications required.

Constructed from premium, hand-laid 2x2 twill weave carbon fiber and autoclave-cured epoxy resin, this lightweight BMW M2 carbon fiber diffuser delivers exceptional strength, durability, and a high-quality finish that complements both stock and modified vehicles. The design closely follows the lower contour of the OEM bumper, adding depth and visual impact while amplifying original styling cues.

Engineered to properly house quad 4.0-inch exhaust tips, this G87 M2 rear diffuser is fully compatible with both factory and aftermarket exhaust systems, ensuring a clean, functional fit and balanced rear-end appearance.

Features and Design:

BMW G87 M2 carbon fiber rear diffuser engineered for precise OEM fitment
Enhances factory body lines with an aggressive, OEM+ aesthetic
Designed to house quad 4.0" exhaust tips (compatible with stock and aftermarket exhausts)
Developed in-house using advanced 3D laser scanning and CAD modeling
Direct bolt-on installation using factory mounting locations and hardware
Constructed from hand-laid 2x2 twill weave carbon fiber
Autoclave-cured epoxy resin for strength, durability, and premium finish
Mimics and enhances the lower section of the factory rear bumper
Product Development:

Our Turner Motorsport Rear Diffuser was designed, engineered, tested and quality inspected by our Research and Development team at Turner Motorsport. We strive for the highest level of precision and quality through leading edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modelling, rapid prototyping utilizing our in-house 3D printer, and rigorous long term product testing.

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Turner Carbon Fiber Add-On Lower Diffuser Kit - F8X
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Only for use with T#584863
Turner Motorsport - Corporate Logo
T#:587860
Part#: 24623TMS01KT
Ships on Jul 24, 2026
Sale - Save 3% $ 1,340.99

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If you already have the Turner upper diffuser installed on your vehicle, this kit includes all of the hardware you need to install the lower as well.
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Turner Carbon Upper & Lower Rear Diffuser Kit - F8X
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Turner Motorsport - Corporate Logo
T#:587258
Part#: 24623TMSKT
Ships on Jul 24, 2026
Sale - Save 15% $ 2,057.99

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$ 1,749.29 USD
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Both Upper & Lower Diffusers paired together to save you money!
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M3 Street Flow Rear Diffuser - E36
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ECS - Corporate Logo
T#:23947136
Part#: 047602LA01KT
In Stock
Sale - Save 34% $ 453.19

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$ 299.00 USD
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$ 299.00 USD
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ECS Exclusive Proudly Offered at Turner Motorsport!

Add-on diffuser to deliver a true motorsport look to your M3. Fastened seamlessly to the bottom of the rear bumper giving a platform to show off your exhaust and complete the rear end of the E36.

The E36 M3 is an amazing looking car right out of the box but a common BMW issue is the height of the front vs rear bumpers. As far back as the E30, the front bumper is much lower than the rear bumper and the E36 M3 faces the same issue. With this problem the front bumper is always super low to the ground and the rear bumper looks in-complete. The ECS add-on diffuser is a unique option for balancing out the rear bumper with the height of the front bumper for a full and complete look.

Give your M3 that wild style that stands out from the crowd, and obtain a nice balanced look. This is just the start of a new line of Street Flow Diffusers diffusers that are a must have extension of your awesome ride. The diffusers come powder coated in a sleek satin-black finish, are a blast to install and fit seamlessly against the rear bumper for a professional looking install every time. The Street Flow diffuser attaches below your factory rear diffuser and exhaust of your choosing to fill out the rear end for a nice full and aggressive styling profile.

Lets take a trip together down a new and unique path. Over the years ECS has designed factory replacement ABS and Carbon Fiber diffusers for all different models of BMW's. For the factory replacements ECS focus was to take the oem characteristics and add a twist and really bring out a more aggressive look with a direct replacement diffuser. For their new line of diffusers, us as car enthusiasts wanted to design a set of diffusers that really pushed the envelope and stepped outside of our comfort zone. Our new line of add-on diffusers is a result of our engineering team and fellow enthusiasts spending time study the M3 chassis, modeling different designs, testing prototypes and making changes to get a final product that we are extremely excited to offer. The E36 M3 Street Flow Diffuser is the first in our line of new diffusers. Stay tuned for the E92 M3 diffusers next!

Features:

Adds an aggressive aesthetic in addition to the subtle factory rear diffuser
Lightweight and durable 10ga aluminum in satin black powder coat to blend with the factory trim color
Installation is secure and simple with ample adjustability built in for perfect fitment
Design:

10 ga 5052 aluminum construction
Black satin powder coat for long term corrosion resistance
5 piece design to simplify installation
Slotted mounting locations to allow for mounting adjustment
Laser cut ECS logo pre powder coat for a smooth finish
Hidden hardware for better aesthetic

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Gloss Black Rear Diffuser - E82/E88 M-Sport
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ECS - Corporate Logo
T#:20485540
Part#: 040790LA01-01
In Stock
Sale - Save 25% $ 397.99

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$ 299.00 USD
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$ 299.00 USD

Presenting the ECS rear diffuser tailored exclusively for your 1 Series – a fusion of both aftermarket and factory styling. Rarely does one find a design that not only encapsulates every curve and contour of a vehicle but elevates its overall aesthetic with a single, impactful addition. Amongst the limited options available for the 1 Series, the engineers at ECS have risen to the challenge of providing aftermarket support for these perfectly sized vehicles.

The diffuser replaces the mundane factory M Sport diffuser with a perfectly fitting alternative, designed to enhance the rear end of the 1 Series. Using the existing factory hardware and tab mounting locations, a transformation is merely a few screws and a plastic trim tool away. During the prototype phase, an impressive fit and finish were achieved, but their commitment to excellence led them to make further refinements. With the updated design, the ECS diffuser is now polished to perfection, an indication of the craftsmanship invested in each product.

Installation is a breeze, requiring no drilling, cutting, or modifications of any kind. Simply remove the current valance, align the tabs, and effortlessly secure the diffuser in place using the factory mounting locations and hardware. Ensure a snug fit by verifying the alignment of all tabs, and with a gentle press, witness the tabs seamlessly click into position.

For those with a 1 Series, anticipate a wave of excitement as a range of exhaust options tailored to all motor variants, including the N52, N54, and N55, are unveiled.

Features and advantages:

Transformative
Enhances the rear aesthetic of the 1 Series
Direct fit utilizing factory clip locations and hardware
Available in Textured Matte Black and Gloss Black
Crafted from lightweight, vacuum-formed UV-stabilized gloss black ABS polymer
Compatible with both E82 and E88 models equipped with the M-Sport Package

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E46 M3 ABS High Kick Rear Spoiler & ABS Diffuser
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Enthusiast Bundles - Corporate Logo
T#:25042503
Part#: 028979TMS01EBKT
In Stock
Sale - Save 40% $ 579.87

This product was last offered at the strikethrough price on
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$ 349.00 USD
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$ 349.00 USD
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Upgrade your BMW E46 M3's exterior with the Turner Motorsport In-House designed Gloss Black ABS Diffuser. Turner Motorsport's engineers were dissatisfied with existing options, so they crafted a new, affordable solution. This direct bolt-on upgrade, mirroring the style of the Turner Carbon Diffuser, boasts a deep profile, aggressive fin design, and full-width coverage on the rear bumper. Easily installed in minutes using factory mounting locations, this exclusive design promises to turn heads and make a bold statement. Stand out with the Turner ABS Diffuser and enhance your BMW's aesthetic.

  • Curvature designed around E46 M3 body lines
  • In-house design using 3D laser scanning and CAD technology for precision fitment
  • Mounts to existing bumper insert locations with OE hardware
  • Lightweight, vacuum-formed ABS polymer in UV-stabilized gloss black
  • Mimics lower bumper section and OE diffuser lines for accentuating OEM features

E46 M3 Gloss Black ABS High Kick Rear Spoiler

Elevate the appearance of your E46 Coupe with the Turner Motorsport ABS High Kick Trunk Spoiler. Crafted to enhance style while considering budget constraints, this spoiler transforms your vehicle without the high cost of a carbon fiber equivalent. Made from impact and UV-resistant ABS plastic, this light and durable spoiler offers a sporty look that sets your vehicle apart. Installation is a breeze with no drilling or cutting; simply use the pre-mounted double-sided adhesive strips provided. Clean the trunk surface, apply the tape, align, and press down for a secure fit.

  • Designed and engineered by Turner Motorsport in-house using 3D laser scanning and CAD technology
  • Mimics the design of the carbon fiber version for similar styling
  • Accentuates OE body lines along the outer edge of the spoiler
  • Uses 3M double-sided tape for a strong bond to the body
  • Lightweight, vacuum-formed gloss black ABS polymer with UV stabilizer
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AutoTecknic Dry Carbon Rear Diffuser Trim Set - G80 M3 | G82/ G83 M4 ...
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AUTOTECKNIC - Corporate Logo
T#:14419810
Part#: BM-0341
In Stock
$ 600.00 USD
$ 600.00 USD
The rear end of your G8X will thank you for this carbon diffuser trim set, giving it a more aggressive and sportier look! Manufactured from the highest-quality dry carbon, this diffuser set is one of the best carbon trim options on the market for your car!
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AUTOTECKNIC Dry Carbon Performante Rear Diffuser - G87 M2
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AUTOTECKNIC - Corporate Logo
T#:20979734
Part#: ATK-BM-0888
Ships in 7 Business Days
$ 795.00 USD
$ 795.00 USD
Looking to change the character of your BMW? This carbon fiber rear diffuser is a great way of getting it done. Carbon fiber means no need to paint, this diffuser will add a beautiful and sporty appearance without being overstated. Constructed of high-quality carbon fiber, this diffuser is sure to impress in every way. Made from high-quality dry carbon fiber, this product is durable and ready to give your car some more personality! Made from high-quality dry carbon fiber, this product is durable and ready to give your car some more personality!
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Chaser Designed Carbon Fiber Rear Diffuser - BMW F32/33/36 4-Series ...
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Suvneer - Corporate Logo
T#:26538302
Part#: F32F1DIF435
Ships in 5 Business Days
$ 430.00 USD
$ 430.00 USD
Looking to upgrade the sporty styling of your BMW? If so, this carbon fiber rear diffuser may be just what you need! This Chaser Designed F32 Carbon Fiber Diffuser is a sleek enhancement for your 4 series that was crafted with a focus on both style and function. This diffuser is constructed from Fiber-Reinforced Polymer (FRP) and features a Glossy Carbon Fiber Coating, giving this diffuser great strength and durability without increasing the diffuser's weight unnecessarily. Key Features: Material: High-quality dry carbon fiber Precision Fitment: Designed for the BMW F32 chassis for a seamless integration Lightweight: Carbon fiber construction reduces weight while maintaining strength Aerodynamic Enhancement: Improves airflow and downforce for better stability Sleek Design: Carbon Fiber light weight with integrated LED F1 Style Brake Light. F1 Style LED wire colors Black - GROUND Red - ACC+ (Parking Light) Yellow - Brake Light + Build Material: Fiber-Reinforced Polymer (FRP) and Glossy Carbon Fiber Coating
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Dinan Carbon Fiber Rear Side Splitters - G80
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Dinan - Corporate Logo
T#:23020157
Part#: D980-0048
Back Ordered
$ 562.99 USD
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$ 562.99 USD
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Dinan Carbon Fiber Rear Side Splitters (rear winglets) offer a simple straightforward solution to enhancing the rear quarters of your G80 M3. Together with the Dinan Rear Diffuser Surround, the combination creates a "full" rear diffuser that is restrained but elevated and creates a nuanced OEM+ option for the marketplace. Features: 2x2 gloss twill dry carbon fiber (pre-preg) manufactured to be impact-resistant, durable, and strong Clear-coated for maximum UV protection and fade resistance Includes mounting screws and also utilizes factory mounting tabs for an easy installation with a clean fit and finish Pair together with the Dinan Rear Diffuser Surround to complete the full rear look
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CSL Style Carbon Fiber Diffuser
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ECS - Corporate Logo
T#:391782
Part#: E46CSLCFDIFF
Back Ordered
Sale - Save 15% $ 505.72

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Half carbon diffuser to complete your CSL look

ADRO F8X M3 / M4 Carbon Rear Diffuser
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ADRO INC. - Corporate Logo
T#:27572112
Part#: A14A10-1301
In Stock
$ 1,290.00 USD
$ 1,290.00 USD

The ADRO diffuser is made of 100% hand-crafted carbon fiber and will bolt up easily to your OEM BMW M3 or M4 rear bumper with no fitment gaps.

This diffuser features built-in aero canards, 100% wet carbon fiber construction, and exhaust cutouts designed to fit both OEM and most aftermarket exhaust tips.

This diffuser kit will completely transform the look of the back of your BMW M3 or M4 and is much easier to install than a lot of the other diffusers on the market.

Includes:

  • 1 Carbon fiber rear diffuser
  • 3M Tape
  • Hardware
  • Installation manual
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AutoTecknic Dry Carbon Rear Splitter Set - G87 M2
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AUTOTECKNIC - Corporate Logo
T#:39531763
Part#: BM-0811
Ships in 7 Business Days
$ 394.99 USD
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Turner Motorsport offers the AutoTecknic Dry Carbon Rear Splitter Set for the G87 M2, providing BMW owners with a functional and stylish upgrade that enhances both performance and aesthetics.
BMW F3 Rear Diffuser MP Designed
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For Vehicles with M-Sport Package Only
Suvneer - Corporate Logo
T#:21834318
Part#: F32PDIFF435
Ships in 5 Business Days
$ 150.00 USD
$ 150.00 USD

BMW F3 Rear Diffuser MP Designed is the perfect upgrade to enhance the aggressive look of your 4-series. This rear diffuser offers a dynamic and sporty appearance, setting your BMW apart from the rest. Key benefits include:

  • Aggressive Design: Provides a bold and distinctive look that enhances the visual appeal of your BMW F3.
  • Premium Build Material: Constructed from high-quality polypropylene, ensuring durability and resistance to impact.
  • Improved Aerodynamics: Designed to optimize airflow, potentially enhancing vehicle stability and performance.
  • Direct Fitment: Engineered to fit seamlessly with the BMW F3 rear bumper for an OEM-quality appearance.

Upgrade your BMW F3 with the MP-designed rear diffuser for a more aggressive and stylish rear end.

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ECS Street Flow Rear Diffuser - E46 M3
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ECS - Corporate Logo
T#:20815172
Part#: 047616LA01KT
Ships in 6 Business Days
Sale - Save 22% $ 509.99

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$ 399.00 USD
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ECS Exclusive Proudly Offered at Turner Motorsport!

Add-on diffuser to deliver a true motorsport look to your M3. Fastened seamlessly to the bottom of the rear bumper giving a platform to show off your exhaust and complete the rear end of the E46.

The E46 M3 is an amazing looking car right out of the box but a common BMW issue is the height of the front vs rear bumpers. As far back as the E30, the front bumper is much lower than the rear bumper and the E46 M3 faces the same issue. With this problem the front bumper is always super low to the ground and the rear bumper looks in-complete. The ECS add-on diffuser is a unique option for balancing out the rear bumper with the height of the front bumper for a full and complete look.

Give your M3 that wild style that stands out from the crowd, and obtain a nice balanced look. This is just the start of a new line of Street Flow Diffusers diffusers that are a must have extension of your awesome ride. The diffusers come powder coated in a sleek satin-black finish, are a blast to install and fit seamlessly against the rear bumper for a professional looking install every time. The Street Flow diffuser attaches below your factory rear diffuser and exhaust of your choosing to fill out the rear end for a nice full and aggressive styling profile.

Lets take a trip together down a new and unique path. Over the years ECS has designed factory replacement ABS and Carbon Fiber diffusers for all different models of BMW's. For the factory replacements ECS focus was to take the oem characteristics and add a twist and really bring out a more aggressive look with a direct replacement diffuser. For their new line of diffusers, us as car enthusiasts wanted to design a set of diffusers that really pushed the envelope and stepped outside of our comfort zone. Our new line of add-on diffusers is a result of our engineering team and fellow enthusiasts spending time study the M3 chassis, modeling different designs, testing prototypes and making changes to get a final product that we are extremely excited to offer. The E46 M3 Street Flow Diffuser is the first in our line of new diffusers. Stay tuned for the E36 M3 and the E92 M3 diffusers next!

Features:

Adds an aggressive aesthetic in addition to the subtle factory rear diffuser
Lightweight and durable 10ga aluminum in satin black powder coat to blend with the factory trim color
Installation is secure and simple with ample adjustability built in for perfect fitment
Design:

10 ga 5052 aluminum construction
Black satin powder coat for long term corrosion resistance
5 piece design to simplify installation
Slotted mounting locations to allow for mounting adjustment
Laser cut ECS logo pre powder coat for a smooth finish
Hidden hardware for better aesthetic

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Street Flow Rear Diffuser - E92 M3
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ECS - Corporate Logo
T#:24179121
Part#: 047898LA01KT
Ships in 6 Business Days
Sale - Save 10% $ 439.99

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$ 395.99 USD
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Sale - Save 10%
$ 439.99

This product was last offered at the strikethrough price on
05-03-2026

$ 395.99 USD
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ECS Exclusive Proudly Offered at Turner Motorsport!

Add-on diffuser to deliver a true motorsport look to your M3. Fastened seamlessly to the bottom of the rear bumper giving a platform to show off your exhaust and complete the rear end of the E92.

The E92 M3 is an amazing looking car right out of the box but a common BMW issue is the height of the front vs rear bumpers. As far back as the E30, the front bumper is much lower than the rear bumper and the E92 M3 faces the same issue. With this problem the front bumper is always super low to the ground and the rear bumper looks in-complete. The ECS add-on diffuser is a unique option for balancing out the rear bumper with the height of the front bumper for a full and complete look. The E92 diffuser also features an optional center fin design to dial in the aesthetic you prefer!

Give your M3 that wild style that stands out from the crowd, and obtain a nice balanced look. This is just the start of a new line of Street Flow Diffusers diffusers that are a must have extension of your awesome ride. The diffusers come powder coated in a sleek satin-black finish, are a blast to install and fit seamlessly against the rear bumper for a professional looking install every time. The Street Flow diffuser attaches below your factory rear diffuser and exhaust of your choosing to fill out the rear end for a nice full and aggressive styling profile.

Lets take a trip together down a new and unique path. Over the years ECS has designed factory replacement ABS and Carbon Fiber diffusers for all different models of BMW's. For the factory replacements ECS focus was to take the oem characteristics and add a twist and really bring out a more aggressive look with a direct replacement diffuser. For their new line of diffusers, us as car enthusiasts wanted to design a set of diffusers that really pushed the envelope and stepped outside of the comfort zone. ECS's new line of add-on diffusers is a result of the engineering team and fellow enthusiasts spending time study the M3 chassis, modeling different designs, testing prototypes and making changes to get a final product that we are extremely excited to offer. The E92 M3 Street Flow Diffuser is part of a new line of diffusers. Check out the diffusers in the line-up including the E36 and the E46 M3 variations!

Features:

Optional center fin included
Adds an aggressive aesthetic in addition to the subtle factory rear diffuser
Lightweight and durable 10ga aluminum in satin black powder coat to blend with the factory trim color
Installation is secure and simple with ample adjustability built in for perfect fitment
Design:

10 ga 5052 aluminum construction
Black satin powder coat for long term corrosion resistance
5 piece design to simplify installation
Slotted mounting locations to allow for mounting adjustment
Laser cut ECS logo pre powder coat for a smooth finish
Hidden hardware for better aesthetic

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ABS Diffuser & LTW Front Lip - Matte Black - E36 M3
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Enthusiast Bundles - Corporate Logo
T#:42234656
Part#: 28202TMS01EBKT2
In Stock
Sale - Save 22% $ 637.99

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$ 499.00 USD
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Upgrade your E36's exterior styling with this exclusive Enthusiast Bundle kit!

Turner Motorsport Smooth ABS Matte Black Diffuser - E36 M3

Features & Specifications:

Diffuser with curvature designed around the E36 body lines Designed in-house using state of the art 3d laser scanning and CAD technology for precision fitment Mounts to existing bumper insert mounting locations with OE hardware Made from lightweight, vacuum-formed ABS polymer, with UV-stabilized black sheet Mimics the lower section of the bumper & OE diffuser lines to accentuate OEM features Mounts to OE clip locations and OE holes on the outer edges of the bumper with supplied, stainless hardware LTW-Inspired ABS Front Lip - Matte Black

Features & Specifications:

LTW inspired design Vacuum formed ABS plastic with UV resistant construction 2-Piece bonded design for increased rigidity Designed by TMS engineers using 3D laser scanning & CAD for precision fitment Uses factory self-tapping screws for installation (Need new hardware? See T#599749) Includes pre-applied 3M double-sided adhesive for additional retention and a tight seal against the front bumper

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Suvneer Motorsports™ Carbon Fiber Rear Bumper Splitters - G22 M440i...
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Suvneer - Corporate Logo
T#:26005161
Part#: G22MTRRSPL
In Stock
$ 280.00

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$ 259.00 USD
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$ 280.00

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Suvneer Motorsports™ presents the G22 Carbon Fiber Rear Bumper Splitters – a cutting-edge addition to elevate the style and performance of your vehicle. Meticulously crafted with precision, these splitters are designed to seamlessly integrate with the rear bumper of various car models, enhancing both the aesthetic appeal and aerodynamic efficiency. Constructed from high-quality carbon fiber, the G22 Carbon Fiber Rear Bumper Splitters not only exude a sense of sophistication but also contribute to the overall durability and lightweight nature of the product. The carbon fiber material is chosen for its strength and resilience, ensuring long-lasting performance while adding a touch of modern elegance to your car's rear end. Key Features: Material: High-quality dry carbon fiber Precision Fitment: Designed for the G22 M Sport ONLY chassis for a seamless integration Lightweight: Carbon fiber construction reduces weight while maintaining strength Aerodynamic Enhancement: Improves airflow and downforce for better stability Sleek Design: Adds a sporty and aggressive look to your vehicle Build Material: Fiber-Reinforced Polymer and Glossy Carbon Fiber Coating We encourage customers to seek professional installation since equipping these products will require the removal of parts currently installed, to better secure fitment to your vehicle.
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MINI R56 JCW GP2 Rear Center Diffuser Retrofit Kit
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ECS - Corporate Logo
T#:2408497
Part#: 51747330558
In Stock
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$ 319.70 USD
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Suvneer Motorsports Carbon Fiber Rear Bumper Splitters - G80 M3, G82...
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Suvneer - Corporate Logo
T#:25772525
Part#: G8XRRSPL-SUV
In Stock
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$ 211.76 USD
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Introducing the Suvneer Motorsports™ G8x M3/M4 Carbon Fiber Rear Bumper Splitter – an extraordinary enhancement designed to augment the rear aesthetics of your BMW G8x M3 or M4. Meticulously crafted with a focus on both style and performance, these carbon fiber rear bumper splitters seamlessly marry form and function, making a powerful visual statement on the road. Crafted from top-tier carbon fiber materials, these rear bumper splitters contribute to the overall lightweight construction of your vehicle while exuding a modern and sporty appeal. The carbon fiber build ensures not only durability and strength but also a sleek appearance that perfectly complements the dynamic nature of the BMW G8x M3/M4. Choose the Suvneer Motorsports™ G8x M3/M4 Carbon Fiber Rear Bumper Splitter for a sophisticated blend of form and function. Elevate your BMW G8x M3/M4's presence on the road with these premium carbon fiber splitters that exemplify precision engineering and a commitment to delivering a stylish and performance-driven enhancement for your driving experience. Key Features: Material: High-quality dry carbon fiber Precision Fitment: Designed for the G8x M3 / M4 chassis for a seamless integration Lightweight: Carbon fiber construction reduces weight while maintaining strength Aerodynamic Enhancement: Improves airflow and downforce for better stability Sleek Design: 2-piece diffuser design adds a sporty and aggressive look to your vehicle We encourage customers to seek professional installation since equipping these products will require the removal of parts currently installed, to better secure fitment to your vehicle.
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BMW F30 F1 Style Carbon Fiber Diffuser With Brake Light
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2011-2019 Msport only
Suvneer - Corporate Logo
T#:13463760
Part#: F30F1DIF335
In Stock
$ 449.99 USD
$ 449.99 USD
An F1 inspired diffuser with a 3rd brake light
Textured Black Rear Diffuser - E82/E88 M-Sport
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ECS - Corporate Logo
T#:20485541
Part#: 040790LA01-02
In Stock
Sale - Save 65% $ 397.99

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$ 139.00 USD
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$ 139.00 USD

Presenting the ECS rear diffuser tailored exclusively for your 1 Series – a fusion of both aftermarket and factory styling. Rarely does one find a design that not only encapsulates every curve and contour of a vehicle but elevates its overall aesthetic with a single, impactful addition. Amongst the limited options available for the 1 Series, the engineers at ECS have risen to the challenge of providing aftermarket support for these perfectly sized vehicles.

The diffuser replaces the mundane factory M Sport diffuser with a perfectly fitting alternative, designed to enhance the rear end of the 1 Series. Using the existing factory hardware and tab mounting locations, a transformation is merely a few screws and a plastic trim tool away. During the prototype phase, an impressive fit and finish were achieved, but their commitment to excellence led them to make further refinements. With the updated design, the ECS diffuser is now polished to perfection, an indication of the craftsmanship invested in each product.

Installation is a breeze, requiring no drilling, cutting, or modifications of any kind. Simply remove the current valance, align the tabs, and effortlessly secure the diffuser in place using the factory mounting locations and hardware. Ensure a snug fit by verifying the alignment of all tabs, and with a gentle press, witness the tabs seamlessly click into position.

For those with a 1 Series, anticipate a wave of excitement as a range of exhaust options tailored to all motor variants, including the N52, N54, and N55, are unveiled.

Features and advantages:

Transformative
Enhances the rear aesthetic of the 1 Series
Direct fit utilizing factory clip locations and hardware
Available in Textured Matte Black and Gloss Black
Crafted from lightweight, vacuum-formed UV-stabilized gloss black ABS polymer
Compatible with both E82 and E88 models equipped with the M-Sport Package

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Street Flow Rear Diffuser & ABS Front Lip - E36 M3
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Enthusiast Bundles - Corporate Logo
T#:37419768
Part#: 047602LA01EBKT
In Stock
Sale - Save 38% $ 762.18

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$ 469.00 USD
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$ 762.18

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$ 469.00 USD
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Unlock Aggressive Style with Turner Motorsport's E36 M3 Street Flow Rear Diffuser Kit & ABS Front Lip!

Achieve an aggressive, cohesive design that enhances your M3's exterior appeal from front to back.

E36 M3 Street Flow Rear Diffuser

The E36 M3 has always been a head-turner, but the rear bumper often lacks the levelled look of the front. With BMW's signature design featuring a lower front bumper compared to the rear—an aesthetic seen across generations—this diffuser brings balance by matching the rear bumper’s height to the front, giving your lowered E36 M3 a sleek, grounded look.

Designed to add a bold edge to your M3, the Street Flow Diffuser is our latest innovation in aggressive styling, specially crafted to bridge the gap between factory lines and custom flair. Each piece is precision-engineered and powder-coated in satin black to perfectly complement the M3's factory trim. Easy to install, the diffuser seamlessly mounts to the rear bumper, ensuring a flawless fit and professional look.

The Street Flow Diffuser is a new venture for Turner Motorsport, diverging from our line of factory-replacement ABS and Carbon Fiber diffusers to deliver a design that pushes the boundaries. After extensive modeling and prototyping, we’re thrilled to debut this product, with more designs in the pipeline. Get ready to take your E36 M3 down a unique path in styling evolution.

Key Features:

Bold Appearance: Complements the OEM rear diffuser with an added aggressive look. Durable Construction: Made from lightweight 10-gauge aluminum, finished with a satin black powder coat for superior durability. Effortless Install: Adjustable slots and hidden color-matched hardware for a streamlined setup. Specifications:

Material: 10-gauge 5052 aluminum with black satin powder coat Design: 5-piece layout for easier installation and maximum fitment adjustment Extra Detail: Includes laser-cut ECS logo and concealed mounting hardware Turner Motorsport ABS Front Lip - Matte Black

An essential upgrade, this ABS Front Lip brings both visual impact and aerodynamic benefits to your M3. The front lip adds downforce for enhanced handling while maintaining a durable build to withstand daily driving conditions, including road debris and uneven surfaces.

Inspired by the E36 LTW design, Turner Motorsport’s ABS Front Lip is a cost-effective alternative to fragile carbon fiber lips. Made from UV-stabilized ABS plastic, this two-piece design resists cracking and shattering, offering a matte black finish that complements the original E36 aesthetic. For added versatility, this lip can be prepped and painted to suit your style preferences.

Features & Specifications:

Inspired Design: E36 LTW-inspired look in a robust ABS form Enhanced Durability: UV-resistant construction for long-lasting performance Precision Fit: Engineered using 3D laser scanning for optimal fitment Easy Install: Uses factory screws and includes pre-applied 3M adhesive for extra security Upgrade your E36 M3’s style with Turner Motorsport’s rear diffuser and front lip combo, adding aggressive lines that turn heads on the street and track alike!

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3D Design Carbon Rear Diffuser - G02 X4 M40i
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3D Design - Corporate Logo
T#:4621116
Part#: 3108-30211
In Stock
$ 1,595.00

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This gorgeous rear diffuser from 3D Design boasts all the major values this brand embodies; exquisite attention to detail, masterful finish work, and supreme fitment. Featuring a carbon-fiber weave pattern laid with care and attention, and a deep rich clear coat finish that will last for years to come, this is a part worth far more than its weight in carbon. 3D Design is focused on high-quality styling components that allow you to personalize the look of your BMW & remain true to the car's original form. Inspired by European tuning trends & Japan's unique VIP tuning style, their wide range of lips, diffusers, side skirts, & spoilers are made from high-quality urethane or super light, super strong prepreg dry carbon and install easily to your factory bumpers & skirts to offer an understated, aggressive performance look. Carbon Fiber Construction Attaches directly in place of stock diffuser
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Dinan Carbon Fiber Rear Diffuser - A90 Supra
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Dinan - Corporate Logo
T#:21045556
Part#: D980-0037
Ships in 5 Business Days
$ 767.99 USD
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$ 767.99 USD
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Dramatic exits come standard with this carbon fiber upgrade. The multi-piece Dinan rear diffuser spotlights the rear of the car and creates a new "floor" that visually appears to make the vehicle lower and more aggressive. Despite the diffuser encompassing the exhaust exits, great care was taken to ensure enough room was supplied to accommodate even large tipped exhausts, like Dinan's own. Additionally, the diffuser adds wrap arounds to each of the rear quarters that allows a harmonious and uniform visual continuation with the Dinan front lip and side skirts for a perfectly matched cosmetic solution. Features: 2x2 gloss twill carbon fiber manufactured to be impact resistant, durable and strong Clear coated for maximum UV protection and fade resistance Includes 3M double sided tape and mounting screws for easy installation with a clean fit and finish
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Suvneer Performance Rear Diffuser - E90 325/328/330
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For vehicles with M-Sport Rear Bumper
Suvneer - Corporate Logo
T#:7292024
Part#: E90PDIFF328
Ships in 5 Business Days
$ 255.00 USD
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Performance inspired matte black plastic diffuser for the E90 3-series. Direct bolt-on, no modification required. **Does not 335i. Requires M-Sport rear bumper.


F10 Carbon Fiber Rear Diffusor For Quad Exhaust
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For M-Sport Bumpers Only
Suvneer - Corporate Logo
T#:5430316
Part#: F10QUADDF-2FINS
Ships in 5 Business Days
$ 499.99 USD
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$ 499.99 USD
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Set your vehicle up for quad tips and give your F10 an amazing look
1M Carbon Fiber Rear Bumper Splitters - E82 - For 1M Design Rear Bump...
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Suvneer - Corporate Logo
T#:21670130
Part#: E821MRRSPL
Ships in 5 Business Days
$ 210.00 USD
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Put the cherry on top with these carbon splitters that go with the 1M design rear bumper! These carbon fiber rear splitters are the final piece you need to complete the 1M look on your 1-series! Build Material: Fiber-reinforced polymer and glossy carbon fiber coating
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E92/E93 M3 3D Design Carbon Fiber Rear Diffuser
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3D Design - Corporate Logo
T#:390514
Part#: 3108-19231
Ships in 3 Business Days
$ 1,995.00 USD
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$ 1,995.00 USD
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These 3D Design side skirts were designed to provide an aggressive, individual stylistic touch to your BMW without being overbearing. Constructed from beautiful carbon fiber, they attach easily and accentuate your BMW's natural body lines, creating a high-class performance look. 

3D Design is focused on high-quality styling components that allow you to personalize the look of your BMW & remain true to the car's original form. Inspired by European tuning trends & Japan's unique VIP tuning style, their wide range of lips, diffusers, side skirts, & spoilers are made from high-quality urethane or super light, super strong prepreg dry carbon and install easily to your factory bumpers & skirts to offer an understated, aggressive performance look.

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Carbon Rear Underbody Floor Kit - G87 M2
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Alpha-N - Corporate Logo
T#:27105136
Part#: AN-0634
Ships in 3 Business Days
$ 3,395.00 USD
$ 3,395.00 USD
Alpha-N has a reputation for pushing the boundaries of performance and style. With Alpha-N's connection to BMW Motorsport and their track record of producing high-quality carbon parts, their latest G8X M2 / M3 / M4 components are no exception. Designed as a 2 part system in combination with Alpha's new G87 M2 carbon rear diffuser, the carbon rear underbody floor kit is also meant to work as a package with the CSL trunk lid and designed to both increase downforce and reduce drag. While taking its cues from the G87 M2's existing bodylines, the rear diffuser and underbody floor kit enhance the rear styling to maximum aggression. The pre-preg carbon construction in a 2x2 weave minimizes weight while maximizing strength.
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AutoTecknic Dry Carbon Motorsport Rear Diffuser - G8x
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AUTOTECKNIC - Corporate Logo
T#:14452852
Part#: BM-0881
Ships in 7 Business Days
$ 895.00 USD
$ 895.00 USD
This rear diffuser is AutoTecknic's newly released dry carbon fiber product for the G8X M3/ M4. The diffuser is designed to mount directly onto the lower factory mounting location for a fast and straightforward installation. Manufactured using 100% genuine 3K Twill-Weave (2X2) Pre-Preg Carbon Fiber with our signature autoclave technology, this diffuser is finished with multiple coatings of high-gloss UV-resistant clear coat. Following the weight-saving principles of motorsport ideals, we utilize the autoclave vacuum forming process to produce this diffuser with superior strength and fitment. Change your car's look and satisfy your carbon cravings today!
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R1 Designed Carbon Fiber Diffuser - F8x
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Suvneer - Corporate Logo
T#:21834345
Part#: F8XR1CFDIF
Ships in 5 Business Days
$ 599.99 USD
$ 599.99 USD
Looking to change the character of your BMW? This carbon fiber rear diffuser is a great way of getting it done. Carbon fiber means no need to paint, this diffuser will add a beautiful and sporty appearance without being overstated. Constructed of high-quality carbon fiber, this diffuser is sure to impress in every way.
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F06/F13 M6 3D Design Carbon Fiber Rear Diffuser - Quad Exhaust Withou...
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3D Design - Corporate Logo
T#:390517
Part#: 3108-20631
Ships in 3 Business Days
$ 2,150.00 USD
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$ 2,150.00 USD
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These 3D Design side skirts were designed to provide an aggressive, individual stylistic touch to your BMW without being overbearing. Constructed from beautiful carbon fiber, they attach easily and accentuate your BMW's natural body lines, creating a high-class performance look. 

3D Design is focused on high-quality styling components that allow you to personalize the look of your BMW & remain true to the car's original form. Inspired by European tuning trends & Japan's unique VIP tuning style, their wide range of lips, diffusers, side skirts, & spoilers are made from high-quality urethane or super light, super strong prepreg dry carbon and install easily to your factory bumpers & skirts to offer an understated, aggressive performance look.

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AutoTecknic Dry Carbon Performance Rear Splitter Set - G82/83 M4 ...
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AUTOTECKNIC - Corporate Logo
T#:38655160
Part#: BM-0045-G82
Ships in 7 Business Days
$ 650.00 USD
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These Carbon fiber side splitters upgrade aerodynamics and create a bold appearance of your G82/G83 M4. Designed for optimal performance, durability, and a dynamic, track-ready aesthetic.

M Performance Style Glossy Black Diffuser - 330i incl. xDrive ...
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Suvneer - Corporate Logo
T#:6212247
Part#: G20PDIFF330-GB
Ships in 5 Business Days
$ 150.00 USD
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$ 150.00 USD
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M-Performance inspired glossy black plastic diffuser for G20 M-Sport. Direct bolt-on, no modification required.

Autotecknic Dry Carbon Extended-Fin Competition Rear Diffuser - F80 M...
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AUTOTECKNIC - Corporate Logo
T#:39261792
Part#: BM-0352-V2
Ships in 7 Business Days
$ 595.00 USD
$ 595.00 USD
Whether you're looking to enhance downforce or simply make a bold styling statement, this premium rear diffuser delivers in every aspect.
ADRO Carbon Fiber Rear Diffuser - BMW G82 M4
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ADRO INC. - Corporate Logo
T#:41526348
Part#: A14A40-1301
Ships in 3 Business Days
$ 2,950.00 USD
$ 2,950.00 USD
Make that quad exhaust pop even more with the ADRO carbon fiber rear diffuser for the G82 BMW M4. Featuring a more aggressive design, carefully engineered aero, and a beautiful carbon fiber finish, this is by far the highest quality and most aggressive rear diffuser currently available for the G82 platform. *Does NOT fit M Performance Center Exhaust*
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Seibon carbon fiber rear diffuser - E46 M3
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Seibon - Corporate Logo
T#:397114
Part#: RD0105BMWE46M3
Special Order: No Guaranteed ETA
$ 720.00 USD
$ 720.00 USD

Founded in 2003 Seibon Carbon excels in delivering premium quality carbon fiber products to those with discerning tastes. The process begins with the best carbon raw material manufactured in either USA or France; in fact it is the same stock that can be found on high performance racecars, battleships and satellites. Supporting race teams is one of Seibons' specialties and you will see their work in many different platforms and racing types. Drivers such as Michele Abbate in her Scion FRS racecar, Fredric Aasbo in his Formula D Scion tC and even team RS-R in Asian Formula D all rely solely on Seibon to get them to the podium.

Using single piece construction, the carbon is laid inside of a mold instead of being wrapped around it. This allows for a much stronger piece in the end and allows much greater control when the resin is applied. Areas such as door hinges, hood latches and window regulator mounting points are reinforced so as to add strength and longevity through repeated use. Application of the resin is then accomplished using proprietary techniques that allow for a much more uniform coating than most competitors and yields a product that is lighter, since there is no excess.

Finally the product is finished with a glossy clear coat this resists chipping and cracking and gives a glossy wet look. Inspection of the finished product is then performed to ensure there is no weave distortion in tight corners or complex bends.

Features:

  • Proprietary methods to lay wet carbon for a stronger and lighter product
  • UV resistant resins, even a weathered part can be wet sanded and brought back to original finish
  • Panels are 70% lighter than stock as opposed to competitors which come in around 50% lighter than stock.
  • No black paint is used to hide imperfections along detail edges and creases.
  • Partnered with SCCA and Formula Drift bringing their top quality fit and finish to the competition environment.

This item fits the following BMWs:
2001 - 2006 E46 M3

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AUTOTECKNIC Dry Carbon Fiber Performante Rear Diffuser - G42 2-SERIES...
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AUTOTECKNIC - Corporate Logo
T#:21045549
Part#: ATK-BM-0885
Ships in 7 Business Days
$ 650.00 USD
$ 650.00 USD
Looking to change the character of your BMW? Carbon fiber means no need to paint, this diffuser will add a beautiful and sporty appearance without being overstated. Constructed of high-quality carbon fiber, this diffuser is sure to impress in every way. This carbon fiber rear diffuser is a great way of getting it done.
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Spec-D M Sport Black ABS Performance Style Rear Diffuser - 2019-2020 ...
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Spec-D Tuning - Corporate Logo
T#:14684347
Part#: LFRDG2019GBMP-BN
Special Order: No Guaranteed ETA
$ 152.99

This product was last offered at the strikethrough price on
02-09-2026

$ 80.99 USD
$ 80.99 USD
Brand new in original box Comes with 1 piece M performance style rear diffuser Made of high-quality, black ABS plastic Paintable to match your vehicle Decreases the drag force, improving aerodynamics Gives your vehicle a more aggressive sporty appearance
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