Carbon Supply
G8X M3/M4 Carbon Fiber Rear Diffuser
G8X M3/M4 Carbon Fiber Rear Diffuser
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Enhance the rear profile of your BMW G80 M3, G82 G83 M4 with this luxury rear bumper diffuser, crafted from dry carbon fiber. Designed for the 2021 model, it offers a perfect combination of style and performance.
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Car Make: Compatible with BMW G80 M3, G82 G83 M4, 2021.
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Material: High-quality dry or wet carbon fiber.
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Item Weight: 0.2 kg.
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Production: 7-15 days.
Comes with free shipping to the US.
- Shock-Proof Packaging
- Fitment Guarantee
- Free Shipping






Learn More
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Free Shipping to the US
All Carbon Fiber products come with FREE shipping to any delivery address located in the US (excluding Puerto Rico, Hawaii, and Alaska). This applies to large items such as hoods and trunks as well.
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OEM Fitment Gauranteed
We provide a 100% guaranteed fitment with your OEM vehicle, given the correct make and model. Free replacements and returns will be given to anyone unsatisfied with their product.
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Safe Shipping Guarantee
We provide a 100% guarantee that your product will be packaged properly to avoid any risk of damage during transport. Free replacements and returns will be given to anyone unsatisfied with their product.

Precision Engineered
All of our carbon fiber components were designed with no expense spared, using CNC mills to produce the molds and templates.

Quality Materials
Only the highest end carbon fiber weaves are used in our production. Ensuring longevity, durability and strength of all our composites.

Advanced UV Coatings
Every Carbon Fiber component is finished using a clear coat infused with a UV resistance chemical substance, preventing early / premature wear of the clear-coat.
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How long does manufacturing take?
Depending on the product size and complexity it can take anywhere from 3-15 days for your component to leave manufacturing.
How long does it take to ship?
As soon as your product is finished with production it can take anywhere from 1-5 days to prepare and package your item.
Is this a direct fit for my vehicle?
As long as the make and model has been verified with the product description then the fitment is guaranteed.
How do I request custom finishes?
Please head over to the custom order inquiry section or message a representative using the website chat feature.