Carbon Fiber Rear Diffusers
A carbon fiber rear diffuser changes the whole back of the car. It fills the space under the bumper, frames the exhaust, and gives the car a lower, wider look. Every diffuser here is listed by exact chassis, so you know it fits before you order.
Most of the lineup is dry carbon, made from prepreg carbon fiber for a lighter part with a clean, even weave. This is real carbon, not a wrap or hydro-dipped plastic.
Rear Diffuser Styles
AutoTecknic offers Performante, Competition, Extended-Fin Competition, Competition Sport, Motorsport, Club Sport and Versus designs, plus diffuser trim sets that keep the factory shape. SQ-Aero diffusers add Type-A, Type-B, V1 and V2 styles, including versions with an F1-style brake light.
Carbon Fiber Diffusers for BMW M and X Models
- M2: F87 M2 / M2 Competition, G87 M2
- M3 / M4: F80 M3, F82/F83 M4, G80/G81 M3, G82/G83 M4
- M5 / M8: F10 M5, F90 M5, G90 M5, G99 M5 Touring, F91/F92/F93 M8
- X models: F97 X3M, F98 X4M, F95 X5M, F96 X6M, G01 X3, G45 X3, G02 X4, G05 X5, G06 X6, G07 X7, G09 XM
- 2, 3, 4, 5 and 8 Series: F74 M235 Gran Coupe, G42 2-Series, F30 M Sport, G20 3-Series, G22/G23 and G26 4-Series, G30 5-Series, G14/G15/G16 8-Series
- Z4 and electric: G29 Z4, G26 i4, G01 iX3, plus a factory gloss black diffuser for the NA5 iX3
Ferrari, Porsche, Audi and Mercedes-AMG
Capristo carbon fiber diffusers cover the Ferrari 458 Italia, 458 Speciale, 488, 488 Pista, F8, Roma and 296, the Porsche 991.2 GT3 RS, the Audi R8 facelift and RS5, and the Mercedes-AMG GT/GTS. SQ-Aero also offers a diffuser for the Audi 8Y RS3.
Brands in This Collection
AutoTecknic, SQ-Aero, Genuine BMW M Performance, Akrapovic, Dinan and Capristo.
Installation
Install depends on the part. Trim sets go on over the factory diffuser, while full replacement units swap out the factory piece and are easiest with the car on a lift. Each product page lists the mounting method and install notes for that chassis. Not sure which one fits your car? Contact us and we will confirm.
For side skirts, spoilers and front lips, see our full carbon fiber aero parts collection.