Carbon Fiber OEM-Style Rear Diffuser – BMW G80 M3 / G82 G83 M4
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.
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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
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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.
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What’s Included
• (1) Carbon Fiber OEM-Style Rear Diffuser (Single Piece)
• Installation hardware not included on most products
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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.
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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.
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Your next mod starts here. Upgrade the build the right way with Eterna Motorworks.
Pairs well with
Carbon Fiber OEM-Style Rear Diffuser – BMW G80 M3 / G82 G83 M4
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Product Questions
Will this fit my vehicle?
This part is made for the models listed above. If you’re unsure, send us your year, make, and model and we’ll confirm fitment for you.
What’s included?
You’ll receive exactly what’s shown. Hardware is not included unless the product description says otherwise.
How difficult is installation?
We recommend professional installation. If you’re local, you can book an install with us directly. Some parts may need trimming, drilling, or adjustment depending on your setup.
Do you ship internationally?
Yes, we ship worldwide. Contact us if you need help placing an international order.
How do I confirm fitment before ordering?
Fitment details are listed on each product page. If you’re unsure or your build has unique specs, submit the form and our team will verify compatibility before you order.
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With over a decade of hands on experience, a growing portfolio of award winning show builds, and direct relationships with top-tier brands, we make sure you get premium products, trusted service, and real automotive expertise. Our team has built multiple award winning vehicles featured at top tier shows like SEMA and Bimmer Invasion. Everything we offer is tested, trusted, and backed by real world experience.
Eterna Motorworks can source or special-order nearly any component for your build — OEM-fitment parts, performance upgrades, carbon fiber aero, suspension, wheels, and even bespoke options depending on the platform. Click here to contact our team.
