OEM-Style Carbon Fiber Rear Extensions – BMW G80 M3 / G82 G83 M4 | Eterna Motorworks
Subtly elevate your G8X’s rear with these OEM‑Style Carbon Fiber Rear Extensions. Crafted from genuine carbon fiber with a UV-resistant gloss finish, these refinements clip directly into the lower bumper corners, enhancing the factory diffuser without altering the existing structure.
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Key Features
• OEM‑styled corner extensions for a refined aesthetic touch
• Constructed from real dry carbon fiber with 2×2 twill weave and UV-clear coating
• Lightweight yet sturdy to maintain design over time
• Direct clip‑in installation—flush fit with existing diffuser, no hardware or trimming required
• Ideal for pairing with OEM or M Performance-style diffusers for a complete look
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Compatible Models
• BMW G80 M3 Sedan (2021–Present) — Base & Competition
• BMW G82 M4 Coupe (2021–Present)
• BMW G83 M4 Convertible (2021–Present)
Designed specifically for G8X chassis geometry—will not fit non‑M 3 Series or prior generations.
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What’s Included
• Pair of OEM-Style Carbon Fiber Rear Extensions (Left + Right)
• 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 professional builders worldwide through unmatched quality, precision fitment, and enduring credibility. Every component is curated to meet the highest expectations in styling, performance, and reliability—whether on the road or the track.
If precision, quality, and subtle styling matter to your build—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
OEM-Style Carbon Fiber Rear Extensions – BMW G80 M3 / G82 G83 M4 | Eterna Motorworks
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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.
