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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 ...
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:6258334
Part#: 006706LA10KT
In Stock
Sale - Save 16% $ 319.99
$ 269.00 USD
Free Shipping
Sale - Save 16% $ 319.99
$ 269.00 USD
Free Shipping
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
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:597333
Part#: 028979TMS01
In Stock
Sale - Save 31% $ 315.99
$ 218.00 USD
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Sale - Save 31% $ 315.99
$ 218.00 USD
Free Shipping
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 Carbon Fiber Rear Diffuser - F87 M2
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:639026
Part#: 028530TMS01
In Stock
Sale - Save 20% $ 683.99
$ 547.19 USD
Free Shipping
Sale - Save 20% $ 683.99
$ 547.19 USD
Free Shipping
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
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:584863
Part#: 023241TMS01
In Stock
Sale - Save 25% $ 704.99
$ 528.74 USD
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Sale - Save 25% $ 704.99
$ 528.74 USD
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A beautiful addition to make the rear of your F8X stand out!

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Gloss Black Rear Diffuser - G80/G82/G83 M3/M4
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:16940491
Part#: 048254LA01KT
In Stock
Sale - Save 25% $ 514.99
$ 386.24 USD
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Sale - Save 25% $ 514.99
$ 386.24 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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Turner Motorsport Smooth ABS Matte Black Diffuser - E36 M3
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:640267
Part#: 006706LA09KT
In Stock
Sale - Save 16% $ 318.99
$ 269.00 USD
Free Shipping
Sale - Save 16% $ 318.99
$ 269.00 USD
Free Shipping
We at Turner Motorsport weren't happy with the current offerings for E36 M3 diffusers, so we decided to create something new!

Turner Motorsport Carbon Fiber Diffuser - E46 M3
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:586814
Part#: 028937TMS01
In Stock
Sale - Save 5% $ 662.99
$ 629.84 USD
Free Shipping
Sale - Save 5% $ 662.99
$ 629.84 USD
Free Shipping
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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Turner Gloss Black ABS Diffuser - G20 M340i/xDrive
10X Entries For Our Spin To Win Sweepstakes! Does not fit factory exhaust tips
Turner Motorsport - Corporate Logo
T#:642120
Part#: 008653LA01
In Stock
Sale - Save 22% $ 511.99
$ 399.00 USD
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Sale - Save 22% $ 511.99
$ 399.00 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
10X Entries For Our Spin To Win Sweepstakes! Does not fit factory exhaust tips
Turner Motorsport - Corporate Logo
T#:642041
Part#: 013748LA01
In Stock
Sale - Save 10% $ 789.99
$ 710.99 USD
Free Shipping
Sale - Save 10% $ 789.99
$ 710.99 USD
Free Shipping
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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Gloss Black Rear Diffuser - G87 M2
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:21012584
Part#: 050525LA01
In Stock
Sale - Save 60% $ 425.99
$ 170.18 USD
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Sale - Save 60% $ 425.99
$ 170.18 USD
Free Shipping

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 Carbon Fiber Add-On Lower Diffuser Kit - F8X
10X Entries For Our Spin To Win Sweepstakes! Only for use with T#584863
Turner Motorsport - Corporate Logo
T#:587860
Part#: 24623TMS01KT
In Stock
Sale - Save 3% $ 1,313.99
$ 1,274.57 USD
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Sale - Save 3% $ 1,313.99
$ 1,274.57 USD
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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
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:587258
Part#: 24623TMSKT
In Stock
Sale - Save 15% $ 2,016.99
$ 1,714.44 USD
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Sale - Save 15% $ 2,016.99
$ 1,714.44 USD
Free Shipping
Both Upper & Lower Diffusers paired together to save you money!
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AUTOTECKNIC - Corporate Logo
T#:14386758
Part#: BM-0045
Ships on Jul 18, 2025
$ 650.00 USD
$ 650.00 USD
These rear side-splitters are AutoTecknic's newly released dry carbon fiber product for the G8X M3/ M4 platform. Also known as the rear winglet, they are designed to mount directly onto the rear factory front bumper for a straightforward installation. Manufactured using 100% genuine 3K Twill-Weave (2X2) Pre-Preg Carbon Fiber with our signature autoclave technology, these lower vents are then 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 lip with superior strength and fitment. Made from high-quality dry carbon fiber, this product is durable and ready to give your car some more personality!
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AUTOTECKNIC - Corporate Logo
T#:14452852
Part#: BM-0881
Ships on Jul 18, 2025
$ 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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AUTOTECKNIC - Corporate Logo
T#:21407029
Part#: ATK-BM-0400
Ships on Jul 18, 2025
$ 580.00 USD
Free Shipping on orders $49 and up
Carbon fiber is a staple in the performance world and has been incorporated into motorsports since the early 80s. Over time companies have taken it upon themselves to create new carbon products to add to your car that may not have been originally available. Autotecknic is no different. If you're looking for a carbon addition that has been made to the highest standards with premium materials, then Autotecknic's line of carbon additions is your one-stop shop. Made to clip on the factory mounting locations and made from vacuumed carbon fiber, this diffuser is made to be durable and mount easily to your F30, improving your car's look with ease!
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AUTOTECKNIC - Corporate Logo
T#:14419810
Part#: BM-0341
Ships on Jul 18, 2025
$ 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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HARD Motorsport - Corporate Logo
T#:390178
Part#: RDIFFUSER.E90
Special Order: No Guaranteed ETA
$ 489.00 USD
$ 489.00 USD

To keep wind drag on the rear end of your E90 335i, HARD Motorsport has developed their lightweight Aluminum Rear Diffuser Kit. It reduces undercar drag, allowing for optimal downforce.

Diffuser is unpainted and does not work with stock exhaust. Straight pipes or custom exhaust work recommended.

 

Fits the following vehicles:

2006-2013 E90 BMW 335i 

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AUTOTECKNIC - Corporate Logo
T#:20979734
Part#: ATK-BM-0888
Ships on Jul 18, 2025
$ 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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AUTOTECKNIC - Corporate Logo
T#:39261792
Part#: BM-0352-V2
Ships on Jul 18, 2025
New Item
$ 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.
AUTOTECKNIC - Corporate Logo
T#:395887
Part#: BM-0350
Ships on Jul 18, 2025
$ 539.99 USD
$ 539.99 USD

We developed this center diffuser from carbon fiber to make the rear end of the M5 more functional and add aesthetic appeal. Our center diffuser is made of 100% true vacuumed carbon fiber for the ultimate weight savings, durability and precision fitment.

Includes one rear center diffuser and mounting hardware. Installation is simple and can be accomplished in your own garage - simply line the diffuser up with your rear bumper and mount using the supplied hardware.

This product fits the following BMWs:
F10 M5 

 

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AUTOTECKNIC - Corporate Logo
T#:21275575
Part#: ATK-BM-0353
Ships on Jul 18, 2025
$ 500.00 USD
$ 500.00 USD
Carbon fiber is a staple in the performance world and has been incorporated into motorsports since the early 80s. Over time companies have taken it upon themselves to create new carbon products to add to your car that may have not been originally available. Autotecknic is no different. If you're looking for a carbon addition that has been made to the highest standards with premium materials, then Autotecknic's line of carbon additions is your one-stop shop. Add some carbon to your M-Performance rear valance! Dry carbon fiber's name comes from its manufacturing process. Dry carbon fiber is formed by using a "pre-preg" or impregnated piece of carbon materials. This piece of carbon is first placed into a mold and then into a sealed autoclave to cure properly. This method creates the least amount of waste and forms a lighter version of carbon than the “wet” method. The autoclave vacuuming process of making dry carbon means fewer pinholes and virtually no air pockets in the carbon. Dry carbon is the highest-quality version of carbon fiber products that are produced.
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AUTOTECKNIC - Corporate Logo
T#:21045549
Part#: ATK-BM-0885
Ships on Jul 18, 2025
$ 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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AUTOTECKNIC - Corporate Logo
T#:14419807
Part#: ATK-BM-0340
Ships on Jul 18, 2025
$ 850.00 USD
$ 850.00 USD
Here's AutoTecknic's newly released Dry Carbon Fiber Competition Sport Rear Diffuser for the F90 M5. It's designed to mount directly onto the lower factory mounting location for a straightforward and swift installation. This AutoTecknic Dry Carbon Competition Sport Rear Diffuser comes with durable, precise, one-piece dry carbon mounting locations. The diffuser is made with our signature autoclave technology for the ultimate lightweight, high durability, and precise fitment. Made from high-quality dry carbon fiber, this product is durable and ready to give your car some more personality!
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AUTOTECKNIC - Corporate Logo
T#:5189166
Part#: ATK-BM-0354
Ships on Jul 18, 2025
$ 850.00 USD
$ 850.00 USD
AutoTecknic was established in 2000 and has since become one of the largest manufacturers and distributors of carbon fiber parts and accessories for a wide variety of manufacturers. Autotecknic's dry carbon fiber competition rear center diffuser for the F90 M5. Designed to mount directly onto the lower factory mounting location for a simple and fast installation. The diffuser is made from carbon fiber and is designed for lightness, high durability, and precise fitment. Dry carbon fiber's name also comes from its manufacturing process. Dry carbon fiber is formed by using a "pre-preg" or impregnated piece of carbon materials. This piece of carbon is first placed into a mold, and then into a sealed vacuum (autoclave) to properly cure. This particular method creates the least amount of waste and forms a lighter version of carbon than the “wet” method. The autoclave vacuuming process of making dry carbon means that there are fewer pinholes and virtually no air pockets that form in the carbon. Dry carbon is the highest quality version of carbon fiber products that are produced.
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AUTOTECKNIC - Corporate Logo
T#:20946768
Part#: ATK-BM-0342
Ships on Jul 18, 2025
$ 945.00 USD
$ 945.00 USD
Looking to change the character of your BMW? This carbon fiber rear diffuser is a great way of getting it done. Constructed of high-quality carbon fiber, this diffuser is sure to impress in every way. Carbon fiber means no need to paint, this diffuser will add a beautiful and sporty appearance without being overstated.
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AUTOTECKNIC - Corporate Logo
T#:39531763
Part#: BM-0811
Ships on Jul 18, 2025
New Item
$ 394.99 USD
$ 394.99 USD
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.
AUTOTECKNIC - Corporate Logo
T#:14419866
Part#: BM-0880
Ships on Jul 18, 2025
$ 850.00 USD
$ 850.00 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.
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AUTOTECKNIC - Corporate Logo
T#:14452863
Part#: BM-0885
Ships on Jul 18, 2025
$ 650.00 USD
$ 650.00 USD
This rear diffuser is AutoTecknic's newly released dry carbon fiber product for the G42. 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.a
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AUTOTECKNIC - Corporate Logo
T#:21407063
Part#: ATK-BM-0350
Ships on Jul 18, 2025
$ 540.00 USD
Free Shipping on orders $49 and up
Carbon fiber is a staple in the performance world and has been incorporated into motorsports since the early 80s. Over time companies have taken it upon themselves to create new carbon products to add to your car that may not have been originally available. Autotecknic is no different. If you're looking for a carbon addition that has been made to the highest standards with premium materials, then Autotecknic's line of carbon additions is your one-stop shop. Give your M5 a more aggressive appearance with this dry carbon fiber diffuser! This carbon fiber center diffuser comprises 100% pre-preg dry carbon technology for the ultimate lightweight, high-durability, and precise fitment. Dry carbon fiber's name comes from its manufacturing process. Dry carbon fiber is formed by using a "pre-preg" or impregnated piece of carbon materials. This piece of carbon is first placed into a mold and then into a sealed autoclave to cure properly. This method creates the least amount of waste and forms a lighter version of carbon than the “wet” method. The autoclave vacuuming process of making dry carbon means fewer pinholes and virtually no air pockets in the carbon. Dry carbon is the highest-quality version of carbon fiber products that are produced.
Show More Show Less