Find Parts That Fit Your Vehicle

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?
Sort By:

Dinan Carbon Fiber Rear Diffuser - A90 Supra
Call In Or Chat For Best Price! 10X Entries Into Our F80 M3 Sweepstakes
Dinan - Corporate Logo
T#:21045556
Part#: D980-0037
Ships in 5 Business Days
Sale - Save 10% $ 799.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 719.96 USD
Free Shipping
Sale - Save 10%
$ 799.99

This product was last offered at the strikethrough price on
09-29-2026

$ 719.96 USD
Free Shipping
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
Show More Show Less
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

Show More Show Less
Dinan Carbon Fiber Rear Side Splitters - G80
Call In Or Chat For Best Price! 10X Entries Into Our F80 M3 Sweepstakes
Dinan - Corporate Logo
T#:23020157
Part#: D980-0048
Back Ordered
Sale - Save 10% $ 584.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 526.46 USD
Free Shipping
Sale - Save 10%
$ 584.99

This product was last offered at the strikethrough price on
09-29-2026

$ 526.46 USD
Free Shipping
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
Show More Show Less

Dinan Carbon Fiber Rear Diffuser Surround - G80/G82/G83
Call In Or Chat For Best Price! 10X Entries Into Our F80 M3 Sweepstakes
Dinan - Corporate Logo
T#:23020158
Part#: D980-0049
Ships in 5 Business Days
Sale - Save 10% $ 949.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 854.96 USD
Free Shipping
Sale - Save 10%
$ 949.99

This product was last offered at the strikethrough price on
09-29-2026

$ 854.96 USD
Free Shipping
Rather than replace the full diffuser and have potential fitment challenges with various exhaust options Dinan has opted to retain the factory gloss black lower portion of the diffuser and only replace the upper diffuser surround with a carbon fiber accent piece. This solution not only guarantees the carbon cosmetics will always play well with any personalization of the exhaust that is adopted but also offers an economical option compared to much pricier alternatives. Together with the Dinan Rear Side Splitters, 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 Utilizes factory mounting tabs for an easy installation with a clean fit and finish Pair together with the Dinan Rear Side Splitters to complete the full rear look
Show More Show Less

Dinan Carbon Fiber Rear Side Splitters - G82/G83
Call In Or Chat For Best Price! 10X Entries Into Our F80 M3 Sweepstakes
Dinan - Corporate Logo
T#:23020150
Part#: D980-0050
Ships in 5 Business Days
Sale - Save 10% $ 584.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 526.46 USD
Free Shipping
Sale - Save 10%
$ 584.99

This product was last offered at the strikethrough price on
09-29-2026

$ 526.46 USD
Free Shipping
Dinan Carbon Fiber Rear Side Splitters (rear winglets) offer a simple straightforward solution to enhancing the rear quarters of your G82/G83 M4. 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
Show More Show Less
Seibon - Corporate Logo
T#:49752796
Part#: RD20TYSUP-MB
Ships in 2 Business Days
$ 1,650.00 USD
Free Shipping on orders $49 and up
Enhance the look of your Supra with this carbon fiber rear diffuser from MB-Style