G8X M3/M4 3D Carbon Fiber Rear Diffuser - G80/G82/G83
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G8X M3/M4 Carbon Fiber Rear Diffuser – 2x2 Weave
Elevate the rear-end aesthetics and performance look of your G8X M3 or M4 with our premium carbon fiber rear diffuser. Crafted from industry-standard, high-quality carbon fiber, this diffuser is built to last while enhancing the aggressive styling of your BMW.
Each unit is constructed using a 3K thread count woven in a classic 2x2 pattern, delivering a sleek and consistent carbon weave throughout the piece. It is finished with a durable, high-gloss anti-UV clear coat that not only gives it a deep shine but also protects against fading and environmental wear over time.
Installation Note:
For proper fitment and secure mounting, the rear bumper must be removed during installation. The diffuser is designed to install using included hardware, which is run through the built-in tabs for a solid and OEM-like fitment.
Fitment:
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BMW G8X Platform
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G80 M3
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G82 M4
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G83 M4 Convertible
Perfect for enthusiasts seeking an aggressive upgrade that complements the bold lines of the G8X chassis, this diffuser strikes the right balance between function and form.
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
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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
What started as a group of BMW enthusiasts tired of overpriced parts and limited options is now a brand trusted by thousands of owners nationwide.
We designed our own product lines from the ground up and built the production infrastructure to make them happen. No middlemen, no compromises. Just the parts we actually wanted on our own builds.
Now we operate out of Oceanside, California, engineering valved exhaust systems, carbon fiber, forged wheels, front-mount intakes, and more. Everything is designed in-house, tested on real platforms, and stocked locally for fast shipping.
This is just the beginning.