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OEM-Style Carbon Fiber Rear Extensions – BMW G80 M3 / G82 G83 M4 | Eterna Motorworks
$499.00 USD
Shipping calculated at checkout.
PREMIUM CARBON FIBER
CRAFTED FOR PRECISION
Every product we offer is chosen for dependable quality, proper fitment, and long-term value.
Product FAQs
WHAT IS YOUR RETURN POLICY?
We accept returns within 14 days of delivery. Items must be unused, uninstalled, unmounted, unmodified, and in original packaging with no signs of test-fit or installation. Customers are responsible for return shipping, and original shipping fees are non-refundable.
Approved returns are issued as store credit only.
Do you accept returns on installed or test-fit items?
No. Any product that has been installed, test-fitted, mounted, modified, or damaged is not eligible for return or exchange.
How long does shipping take?
Most in-stock items ship within 3–5 business days. Delivery times depend on your location and the shipping method selected at checkout.
Do you offer order cancellations?
Because orders begin processing immediately, we do not guarantee cancellations once an order is placed.
If you need assistance click here to contact our team.
What happens if my item arrives damaged?
If your order arrives damaged, click here to submit photos and start a claim within 48 hours of delivery. Our team will review your case and issue a replacement if approved.
What if my package is lost?
BMW Carbon Hub is not responsible for:
• Lost packages
• Stolen packages
• Carrier delays
• Misrouted shipments
• Packages marked “delivered” but not received
Once the carrier accepts the package, liability transfers to the customer. If your package is lost or stolen, you must file a claim directly with the carrier.
Do you cover fitment issues?
We guarantee proper fitment for the exact vehicle listed on the product page. If the wrong model or trim is ordered, the customer is responsible for return shipping and eligibility depends on product condition.
Are installation damages covered?
Each product undergoes a detailed quality inspection before it leaves our facility to ensure it arrives in perfect, undamaged condition.
Because we cannot oversee installation practices, any damage that occurs during installation, modification, or paint work is not covered.
For the best results, we recommend installation by a trusted professional familiar with BMW platforms.
Are pre-painted or custom-finished items returnable?
No. Any custom-finished, painted, special-order, or modified item is final sale and cannot be returned.
Description
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.
Fitment Confirmation
This part is designed for the BMW models listed above. If you’d like us to verify fitment before ordering, send your year, make, and model — or click here to contact our team and we’ll confirm it for you.
What’s Included
You’ll receive exactly what’s shown in the product photos. Hardware is included only if the product description states so.
Installation Details
Professional installation is strongly recommended. Carbon fiber parts may require minor adjustments during mounting depending on your setup. Installation difficulty varies by model, but most parts are designed for straightforward fitment when handled by an experienced installer.
International Shipping
Yes — we offer international shipping. Rates and delivery timelines vary based on your location and will be provided with your custom quote. International orders may require duties or taxes, which are the responsibility of the buyer. We regularly ship BMW parts worldwide, and our team will guide you through the process. For a custom shipping quote click here to contact our team.