Sharpen the rear profile of your G8X M3 or M4 with Performance V1 prepreg carbon fiber rear diffuser extensions. Designed for sedan, coupe, and convertible models, these extensions enhance the factory diffuser with a longer, more aggressive profile while maintaining a clean OEM plus appearance.

Constructed from 100 percent genuine prepreg carbon fiber and cured in an autoclave, these extensions offer a lightweight yet rigid structure with consistent weave quality and a refined matte finish. Compared to traditional wet carbon, prepreg construction provides improved strength, reduced weight, and a more uniform surface with minimal resin variation.

Installation is straightforward and does not require cutting, drilling, or adhesive. The factory diffuser extensions are removed and replaced directly with the prepreg carbon pieces, reusing all OEM mounting points and hardware for proper fitment. Each set includes both driver and passenger side extensions designed to follow the factory bumper contours closely.

Professional installation is recommended to ensure optimal alignment and long term durability.

FITMENT (Please be sure to select your model below!)

- G80 M3

- G82 / G83 M4