Frame the rear end of your G80 or G82 with our OEM‑style Carbon Fiber Rear Diffuser. Constructed from authentic dry carbon fiber with a pristine UV‑resistant finish, it delivers factory‑matched elegance coupled with aggressive visual character. Designed for seamless replacement, it enhances the stock silhouette while giving your ride a distinct edge.

⸻

Key Features

• Full replacement rear diffuser matching OEM styling cues

• Made from real dried 2×2 twill carbon fiber with UV-protective clear finish

• Lightweight yet rigid—preserves fit and form at speed

• Installs over factory diffuser using existing clip or fastener points—no trimming required on most installs

⸻

Compatible Models 

• BMW G80 M3 Sedan (2021–present)

• BMW G82 M4 Coupe (2021–present)

• BMW G83 M4 Convertible (2021–present)

This diffuser is engineered as a direct replacement for OEM parts on G8X platforms only—not compatible with non‑M 3 Series or legacy models.

⸻

What’s Included

• (1) Carbon Fiber OEM-Style Rear Diffuser (Single Piece)

• Installation hardware not included on most products

⸻

Why Buy From Eterna Motorworks

Eterna Motorworks is the standard in premium aftermarket automotive parts and services. With over a decade of hands-on craftsmanship, we’ve earned the trust of enthusiasts and professionals alike through unrivaled quality, precision fitment, and long-term credibility. Each product is curated to exceed your expectations in styling, performance, and reliability—on the track or the street.

If you’re improving your build with intention and authenticity—welcome to the team.

⸻

Professional installation is highly recommended.

Installation hardware not included on most products.

For full fitment, installation, and store policy details, please refer to our policies before purchasing.

Worldwide shipping available upon request.

⸻

Your next mod starts here. Upgrade the build the right way with Eterna Motorworks.