



G8X M3/M4 - Carbon Fiber Outer Diffuser Trim
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G8X M3/M4 – Carbon Fiber Outer Diffuser Trim
Enhance the aggressive rear styling of your G8X M3 or M4 with our Carbon Fiber Outer Diffuser Trim. Designed to perfectly complement the factory diffuser, these trims provide a lightweight, high-quality carbon fiber accent that elevates both aesthetics and presence.
Key Features:
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Direct Fit Design: Precision-engineered to integrate seamlessly with your factory rear diffuser for a clean, OEM-style finish.
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Premium 2x2 Weave Carbon Fiber: Lightweight, durable, and crafted for a high-end, long-lasting appearance.
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UV-Resistant Clear Coat: Protects against fading and yellowing, ensuring your carbon fiber stays glossy over time.
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Aggressive Styling: Subtle yet striking addition that enhances the sporty look of your G8X M3 or M4.
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Easy Installation: Clips directly into existing mounting points with no modifications required.
Compatibility:
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BMW G80 M3 (2021+)
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BMW G82 M4 Coupe (2021+)
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BMW G83 M4 Convertible (2021+)
Why Upgrade?
These Carbon Fiber Outer Diffuser Trims are perfect for enthusiasts seeking a factory-quality carbon fiber upgrade. They deliver a bold, track-inspired aesthetic while keeping your M3 or M4 looking sleek and aggressive from every angle

G8X M3/M4 - Carbon Fiber Outer Diffuser Trim
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
Orders take 24–48 hours to process once placed. Made-to-order items begin production after processing, while in-stock items are prepped, packaged, and ship within 3–4 days from our Oceanside, CA location (please allow extra time for packages to arrive during high-volume periods). Some items may be backordered—if so, we’ll email you with status and options. Freight items such as wheels, exhausts, trunks, and hoods require additional handling time and may ship separately.
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Customer Support
Real BMW-savvy humans here. We’re available Mon–Fri, 10am–5pm PT by email and phone/text for install questions, fitment help, or order updates. Send your year/model/trim (VIN if handy) and we’ll point you to the right parts fast.
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FAQ’s
Quick answers to the most common questions: fitment & compatibility, order changes/cancellations, build & lead times, international shipping & duties, and returns/exchanges. Start there for instant clarity—then reach out if you still need a hand.
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Contact Us
Need help choosing parts or tracking an order? Send an email to our support team, support@cencalmotorsport.com
Buy with confidence
Fitment guarantee
Engineered for your BMW. Guarantee applies with professional installation — if it doesn’t fit, we fix it.
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Real Support
Talk to real enthusiasts. Our team answers every email same business day (Mon–Fri, 9AM–5PM PST) so you’re never left hanging when it comes to your build.

About Us
Cen-Cal Motorsport isn’t just a parts shop, it’s a lifestyle for BMW enthusiasts who crave performance, precision, and style. We’re all about taking your BMW to the next level with premium parts that bring out the beast under the hood while keeping its luxury look on point.
Your BMW isn’t just a car—it’s an experience. Whether you're upgrading for speed, handling, or simply flexing on the road, we’ve got the gear to match your passion.
Why settle for stock? Explore our lineup and see how real quality transforms the drive. Got questions? Hit us up anytime—your ride deserves nothing but the best.


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