Rear Diffusers Carbon Fiber BMW F32 | F33 | F36 4 Series

Carbon fiber rear diffusers for BMW F32 4 Series Coupe, F33 Convertible and F36 Gran Coupe models with the M Sport rear bumper. They fit the lower section of the rear bumper, give the rear of the car a finned, race-car look and can be ordered with a cut-out that matches your exhaust.

Pre-order: the following variants are made to order, with an expected delivery time of more than 30 days: END CC Style, ECC Style rear lip, ECC Style rear lip (forged carbon) and 3D Style (forged carbon).

Available styles

• MP Style – finned diffuser with 4–5 vertical fins and mesh outer vents, for all three exhaust layouts.
• MP Style with brake light – one-piece, finned carbon diffuser with an F1-style LED brake light in the center and mesh inserts in the outer sections, for dual-side exhaust. The LED has to be wired in.
• END CC Style – fin-less diffuser insert with a smooth, boxed center section and side cut-outs, made from 2x2 weave carbon with a glossy UV-resistant clear coat, for quad exhaust.
• ECC Style rear lip and ECC Style rear lip (forged carbon) – full-width lower rear lip with tall, vertical corner blades and quad exhaust cut-outs (2 per side), in carbon fiber or forged carbon.
• 3D Style and 3D Style (forged carbon) – finned center section and side covers that wrap around the corners, for quad exhaust, in carbon fiber or forged carbon.
• KB Style, KB Style (matte carbon) and KB Style (forged carbon) – large center fins and mesh-vented corner sections around the quad exhaust cut-outs, made from dry pre-preg carbon (gloss or matte 3K, or forged). Mounts to the factory mounting points; the rear canard pair shown in the photos is available separately in our Canards product.

Photo coming soon for the following variants: ECC Style rear lip (forged carbon), 3D Style, 3D Style (forged carbon), KB Style (matte carbon) and KB Style (forged carbon).

Exhaust layout

• Single-side exhaust (428i, 430i) – cut-out on the left side only.
• Dual-side exhaust (435i, 440i) – one cut-out per side.
• Quad exhaust – two cut-outs per side, for an M Performance or aftermarket quad exhaust.

Always choose the layout that matches the exhaust on your car!

Compatibility

All variants are made for the M Sport rear bumper; they do not fit the base (non-M Sport) bumper or the different bumper of the BMW M3 / M4 (F80/F82/F83).

• F32 Coupe, F33 Convertible and F36 Gran Coupe (2014–2020): MP Style, END CC Style and 3D Style. The quad exhaust version of the MP Style does not fit the F36 Gran Coupe, and with this version each exhaust tip can be at most 3.5 in (approx. 89 mm) in diameter.
• F32 Coupe and F33 Convertible only: MP Style with brake light, ECC Style rear lip and KB Style (2014–2020).

Installation

Installing the diffuser usually requires removing the rear bumper, and on the brake light version the LED also has to be wired in, so we recommend professional installation. For the LED brake light version, check the applicable regulations before road use. If you have any questions, feel free to contact us!