Rear Diffuser

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

Alpha-N's V2 carbon rear diffuser for the G90 M5 or G99 M5 Touring is significantly more aggressive and functional vs the more OE-styled V1 piece. Featuring an integrated "underbody floor" section around the center of the diffuser, the V2 carbon piece both increases downforce and reduces drag vs the V1 variant.

All Alpha-N exterior parts are focused on functional aerodynamic improvements, and the G9X M5 V2 rear diffuser is no exception while also enhancing the rear styling.

Product Details:

2x2 weave; carbon pre-preg construction

Gloss finish

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 

BMW Performance Style Rear Diffuser

Enhance the rear aesthetics of your BMW with a striking BMW Performance Style Rear Diffuser. Whether you're replacing an original or complementing your existing bumper, this diffuser exudes an aggressive style that stands out. Designed to accentuate your vehicle's rear while following its natural lines, it ensures a distinctive appearance. Enjoy a hassle-free installation with guaranteed fitment, elevating your BMW's visual appeal effortlessly.

G80 M3 Gloss Black High Kick Trunk Spoiler

Upgrade your G80’s rear with the Turner Motorsport Gloss Black High Kick Trunk Spoiler, engineered to enhance both the aesthetics and performance of your M3. This trunk spoiler is designed to flow seamlessly with your vehicle’s body lines, adding a sporty, aggressive edge while improving aerodynamics. Its high-gloss finish and motorsport-inspired shape will set your M3 apart from the crowd.

Crafted from durable, UV-stabilized ABS polymer, this spoiler is built to last while providing a sleek, high-performance look. No drilling, cutting, or modifications are required—just clean the trunk surface, apply the spoiler using the high-strength dual-sided tape, and you’re good to go. For a personalized touch, the spoiler can also be painted to match or contrast your vehicle’s color.

Features & Specifications:

Aerodynamic Design: High-kick shape enhances aerodynamics and adds an aggressive, sporty look. Durable Construction: Made from UV-stabilized ABS polymer for a long-lasting, high-gloss finish. Perfect Fitment: Designed to follow the factory body lines for a seamless integration. Easy Installation: No drilling or modifications required—simply adhere with pre-applied high-strength dual-sided tape. Customizable: Can be installed as-is or prepped for custom paint. G80/G82 Gloss Black Rear Diffuser

Elevate your M3’s exterior with the Turner Motorsport Gloss Black Rear Diffuser. Designed to perfectly complement the aggressive styling of the G80 and G82, this diffuser features a deep profile and bold fin design that enhances the rear bumper’s contours. Crafted from lightweight, vacuum-formed ABS polymer, it’s both durable and sleek, ensuring that your M3’s rear end gets the attention it deserves.

This direct-fit upgrade uses existing factory mounting locations and hardware, making installation simple and hassle-free. The diffuser’s design adds dimension to the rear of the vehicle, accentuating the exhaust exits and giving the car an even more dynamic presence. Whether you're upgrading to larger exhaust tips or simply want to enhance the look of your M3, this rear diffuser is the perfect choice.

Features & Specifications:

Aggressive Styling: Deep profile with bold fins and outlined design accentuates the G80/G82’s rear bumper and body lines. Perfect Exhaust Fitment: Designed to house quad 4.0" exhaust tips, perfect for both upgraded and factory exhaust systems. Precision Engineering: Developed in-house using advanced 3D laser scanning and CAD technology for a precise fit. Durable Construction: Made from lightweight, UV-stabilized gloss black ABS polymer for a durable, weather-resistant finish. Easy Installation: Direct-fit design mounts to factory locations with supplied hardware—no modifications required. Take your G80 or G82 M3 to the next level with this performance-inspired Enthusiast Bundle. Featuring the Turner Motorsport Gloss Black High Kick Trunk Spoiler and Rear Diffuser, this kit delivers aggressive styling, enhanced aerodynamics, and easy installation. Perfect for those looking to make a statement on the road, this upgrade combines precision engineering and OEM+ fitment for the ultimate performance aesthetic.

E36 Sedan LTW Spoiler:

Experience a modern interpretation of LTW styling with our latest creation. Inspired by the classic E36 lightweight, and crafted with precision by our expert engineering team at Turner, we proudly introduce our carbon LTW spoiler, setting a new standard in the industry. Carefully crafted with a multi-piece carbon design, our spoiler is not just an accessory; it's a work of art featuring a flawless glass-like finish and perfectly matched carbon weave.

As fellow enthusiasts, we understand the importance of preserving the integrity of E36s and their components. With iconic colors like Techno Violet, Boston Green, and Estoril Blue in mind, we refuse to compromise the original trunk and paint with traditional drilling methods. Instead, our carbon LTW spoiler features an innovative fastening system that requires no modifications and preserves your car's pristine showroom finish. With precision-engineered billet clamps and high-quality 3M double-sided tape, installation is a breeze, requiring only basic hand tools. No drilling is necessary.

Research and development:

We feel it is crucial to share our journey into the design and engineering that went into developing this remarkable carbon spoiler. The development of this LTW spoiler was not a quick process; it spanned over three years. Throughout this time, we dedicated ourselves to refining, testing, and making adjustments to craft a spoiler that we're thrilled to introduce to the community.

From perfecting the form and fitment to ensuring the spoilers's stability, every aspect of this project presented significant challenges. This carbon spoiler is comprised of 5 components, the base spoiler, 70mm risers, upper spoiler, gurney flap, and most importantly the mounting brackets.

Anyone familiar with carbon fiber knows the difficulty of working with these nearly 50-inch wide pieces to achieve straightness without flex while maintaining a consistent carbon weave pattern. During the initial stages of carbon testing, the manufacturing process proved to be nothing short of impossible. Issues such as carbon fiber twisting during curing, waviness in the exterior appearance, and mismatched carbon weave posed significant hurdles.

Furthermore, ensuring precise fitment was paramount. Not only did the spoiler components need to seamlessly integrate with the trunk gaps, but they also had to clear adjacent body portions without error. We underwent rigorous testing, cycling through five sets of carbon spoiler prototypes before achieving a result that met our exact standards.

Numerous adjustments were made throughout the project, including modifications to the carbon composition, bracketry, and the incorporation of gaskets between carbon layers. Our passion and dedication were poured into every aspect of this product.

Throughout the project timeline, we conducted extensive long-term testing on various vehicles, subjecting the spoiler to speeds beyond what can be publicly disclosed. When we say these spoilers are secure, we mean it. Utilizing both 3M double-sided tape and four billet brackets with a total of eight fasteners, this spoiler can be confidently installed. The billet mounting brackets are designed to fasten over the top of the factory seam sealer on the underside of the trunk for maximum stability. Near the end of testing, we decided to add an adhesive-backed gasket to the underside of the base, providing yet another layer of paint protection.

Styling:

The greatest part we have enjoyed over this project is the versatile style of the spoiler as designed. If you have read this far into our development process we can strongly say that you are a true car enthusiast. As car enthusiasts we can never leave the car alone, changing setups and most importantly styling. With the multi-piece design, the option to change up your look is just moments away with a little help from some hand tools.

Initially, we were fully committed to running the complete setup: full height, 70mm risers, and gurney flap – all inspired by the LTW look with a modern carbon twist. However, as we spent more time with the spoiler, our perspective shifted. We decided to remove the 70mm risers and suddenly rediscovered our love for the E36's original aesthetic. Without the risers, the spoiler took on a new, understated elegance, blending seamlessly with the car's overall design.

Time passed, and we began to explore other options. Removing the gurney flap toned down the race car vibe, revealing yet another layer of the spoiler's versatility. Each subtle alteration brought about a significant change in style, proving that even the smallest adjustments could make a world of difference.

Our journey with the spoiler was one of constant evolution; from full-on LTW racing aesthetics to more understated styling and back again. This flexibility was the true beauty of our creation, keeping us engaged and dedicated throughout the rigorous development process.

E36 M3 Street Flow Rear Diffuser

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

Upgrade your MINI's aero package with the JCW Aerodynamic Package Trim in gloss black, designed to elevate your vehicle's appearance. This trim serves as an ideal replacement for a damaged or worn-out unit or as an enhancement for a more dynamic aesthetic.

Crafted from gloss black textured plastic, this trim seamlessly complements your MINI's existing trim, creating a cohesive and polished look. Known for its Japan style full body painted appearance, Turner Motorsport offers an effortless solution, eliminating the need for frequent black care maintenance.

With meticulous attention to detail, this kit adheres to the factory design trim, incorporating factory-style tabs for a secure fit. The comprehensive kit includes front spoiler set, all four Euro-style wheel arches with clips, side skirt set lower trim, and rear bumper extension set, transforming your USA Spec MINI's wheel arches into a sleek Euro look by eliminating front amber and rear red side markers.

Note: Does not include GP2 rear diffuser.

Give your E46 M3 a serious rear-end makeover! With this special Enthusiast Bundle, you'll amp up exterior styling, balance out the car’s look, and get a bold, aggressive finish.

E46 M3 Street Flow Rear Diffuser

While the E46 M3 is a visual icon, many enthusiasts feel that the factory rear bumper sits too high, creating an unbalanced appearance—especially for lowered models. Our Street Flow Rear Diffuser is here to address this. Inspired by BMW’s iconic front-to-rear styling mismatch, this diffuser aligns your rear bumper’s profile with the lower front bumper, giving your M3 a more cohesive and grounded look.

This add-on diffuser, with its satin-black powder coat, offers an aggressive, head-turning look while blending seamlessly with the factory styling. It fits directly beneath the stock rear diffuser and around your exhaust, creating a full-bodied, assertive profile that’s guaranteed to stand out. Perfect for enthusiasts seeking a bolder appearance without compromising factory fitment, the Street Flow Diffuser is the first release in our all-new series of add-on diffusers. Be on the lookout for future designs for the E36 and E92 M3 models!

Key Features:

Bold Styling: Enhances the stock diffuser for a more aggressive rear end Durable Construction: Made from lightweight yet strong 10-gauge 5052 aluminum Satin-Black Finish: Powder-coated for corrosion resistance and a factory-like appearance Precision Fitment: Adjustable installation slots for a perfect fit Seamless Aesthetics: Comes with hidden color-matched hardware and a laser-cut ECS logo for a premium look Specifications:

Material: 10-gauge 5052 aluminum Design: 5-piece construction for ease of installation and durability Mounting: Slotted mounting points for easy adjustments ABS High-Kick Rear Trunk Spoiler

Looking to bring more edge to your E46 coupe? The Turner Motorsport ABS High-Kick Trunk Spoiler adds that perfect sporty touch—without the high cost of carbon fiber. Designed for easy, drill-free installation, this spoiler transforms your trunk lid’s look with its high-kick style that complements the E46’s original body lines. Crafted from impact-resistant, UV-protected ABS plastic, this spoiler provides durability along with a polished, gloss black finish that catches the eye.

Using precision 3D laser scanning and CAD technology, Turner Motorsport developed this spoiler for a perfect fit that mirrors our premium carbon fiber version. With pre-installed double-sided 3M adhesive strips, you can apply this spoiler in minutes—simply clean, align, and press down for a secure fit that’ll turn heads.

Key Features:

Sporty Look: Enhances the E46’s lines with an aggressive, high-kick style Easy Installation: No drilling or permanent modifications required; mounts with 3M double-sided tape High-Quality Build: Made from lightweight, UV-resistant ABS for long-lasting looks Precision Fit: Designed using 3D scanning and CAD for factory-like fitment Specifications:

Material: Gloss black ABS plastic with UV stabilizer Installation Method: Pre-mounted 3M adhesive strips for secure mounting

E36 Coupe LTW Spoiler:

Experience a modern interpretation of LTW styling with our latest creation. Inspired by the classic E36 lightweight, and crafted with precision by our expert engineering team at Turner, we proudly introduce our carbon LTW spoiler, setting a new standard in the industry. Carefully crafted with a multi-piece carbon design, our spoiler is not just an accessory; it's a work of art featuring a flawless glass-like finish and perfectly matched carbon weave.

As fellow enthusiasts, we understand the importance of preserving the integrity of E36s and their components. With iconic colors like Techno Violet, Boston Green, and Estoril Blue in mind, we refuse to compromise the original trunk and paint with traditional drilling methods. Instead, our carbon LTW spoiler features an innovative fastening system that requires no modifications and preserves your car's pristine showroom finish. With precision-engineered billet clamps and high-quality 3M double-sided tape, installation is a breeze, requiring only basic hand tools. No drilling is necessary.

Research and development:

We feel it is crucial to share our journey into the design and engineering that went into developing this remarkable carbon spoiler. The development of this LTW spoiler was not a quick process; it spanned over three years. Throughout this time, we dedicated ourselves to refining, testing, and making adjustments to craft a spoiler that we're thrilled to introduce to the community.

From perfecting the form and fitment to ensuring the spoilers's stability, every aspect of this project presented significant challenges. This carbon spoiler is comprised of 5 components, the base spoiler, 70mm risers, upper spoiler, gurney flap, and most importantly the mounting brackets.

Anyone familiar with carbon fiber knows the difficulty of working with these nearly 50-inch wide pieces to achieve straightness without flex while maintaining a consistent carbon weave pattern. During the initial stages of carbon testing, the manufacturing process proved to be nothing short of impossible. Issues such as carbon fiber twisting during curing, waviness in the exterior appearance, and mismatched carbon weave posed significant hurdles.

Furthermore, ensuring precise fitment was paramount. Not only did the spoiler components need to seamlessly integrate with the trunk gaps, but they also had to clear adjacent body portions without error. We underwent rigorous testing, cycling through five sets of carbon spoiler prototypes before achieving a result that met our exact standards.

Numerous adjustments were made throughout the project, including modifications to the carbon composition, bracketry, and the incorporation of gaskets between carbon layers. Our passion and dedication were poured into every aspect of this product.

Throughout the project timeline, we conducted extensive long-term testing on various vehicles, subjecting the spoiler to speeds beyond what can be publicly disclosed. When we say these spoilers are secure, we mean it. Utilizing both 3M double-sided tape and four billet brackets with a total of eight fasteners, this spoiler can be confidently installed. The billet mounting brackets are designed to fasten over the top of the factory seam sealer on the underside of the trunk for maximum stability. Near the end of testing, we decided to add an adhesive-backed gasket to the underside of the base, providing yet another layer of paint protection.

Styling:

The greatest part we have enjoyed over this project is the versatile style of the spoiler as designed. If you have read this far into our development process we can strongly say that you are a true car enthusiast. As car enthusiasts we can never leave the car alone, changing setups and most importantly styling. With the multi-piece design, the option to change up your look is just moments away with a little help from some hand tools.

Initially, we were fully committed to running the complete setup: full height, 70mm risers, and gurney flap – all inspired by the LTW look with a modern carbon twist. However, as we spent more time with the spoiler, our perspective shifted. We decided to remove the 70mm risers and suddenly rediscovered our love for the E36's original aesthetic. Without the risers, the spoiler took on a new, understated elegance, blending seamlessly with the car's overall design.

Time passed, and we began to explore other options. Removing the gurney flap toned down the race car vibe, revealing yet another layer of the spoiler's versatility. Each subtle alteration brought about a significant change in style, proving that even the smallest adjustments could make a world of difference.

Our journey with the spoiler was one of constant evolution; from full-on LTW racing aesthetics to more understated styling and back again. This flexibility was the true beauty of our creation, keeping us engaged and dedicated throughout the rigorous development process.

E36 M3 Street Flow Rear Diffuser

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

Carbon Fiber Trunk Spoiler

When designing the E46 M3 CSL, BMW opted for a high-kick trunk spoiler, a stylistic choice many enthusiasts deem a perfect addition to their BMW's exterior. This aggressive exterior addition instantly transforms both performance and overall aesthetics, making it an important modification for any performance-inspired build.

Opting to transfer CSL styling to the newest 2-series, Turner Motorsport decided to go above and beyond. Manufactured from hand-laid epoxy resin 2x2 twill weave carbon fiber, this piece is sure to add a race-track appearance to your BMW. The carbon fiber high-kick trunk spoiler was designed in-house using state-of-the-art 3D laser scanning and CAD technology to ensure optimal integration with vehicle bodywork. Turner's engineers paid close attention to factory trunk, roof, and rear bumper details to mirror existing styling with this piece, creating a blended look and OEM presentation.

Thanks to the included pre-applied adhesive tape, this spoiler installs without cutting, drilling, or permanent modification. Once the spoiler is aligned with your trunk, simply remove the backing on the double-sided tape, clean the mounting surfaces, and press the spoiler onto the trunk lid.

Features:

Mimics the lines of the trunk lid and roof contours to accentuate OEM features

Designed in-house at Turner using state-of-the-art 3D laser scanning and CAD technology for precision fitment

Includes pre-applied adhesive tape for easy install

Made from lightweight, hand-laid epoxy resin pre-impregnated 2x2 twill weave carbon fiber cloth and autoclave cured

Clear coated for excellent finish durability and UV resistance

Can be painted for a color-matched look with standard body shop prep work

Gloss Black Diffuser

Enhance the look of your G87 with the 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 Turner Motorsport 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