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Not sure which one? Ask us to confirm fitment first →For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. Outside the UK, shipping is shown at checkout and local customs and taxes remain your responsibility.
Some products are made to order, imported or custom built. If timing matters, contact us before ordering and we will confirm the expected delivery timeframe.
Send the vehicle, engine and current setup if you want us to confirm the exact application before checkout.
Designed to complement the factory rear bumper, these premium rear side diffusers add an aggressive motorsport-inspired appearance while maintaining OEM-quality fitment and finish.
Manufactured by Auto Addict USA , each diffuser is produced using advanced 3D scanning technology , precision CNC-machined molds , and aerospace-grade pre-preg (dry) carbon fiber . Every component is autoclave cured to ensure maximum strength, lightweight performance, and an exceptional carbon fiber weave that outperforms traditional wet carbon fiber construction.
Finished with a UV-resistant high-gloss clear coat, these diffusers provide long-lasting durability while giving your BMW M4 a more aggressive and refined rear-end appearance.
At Auto Addict USA , every carbon fiber component is engineered using advanced 3D scanning, CNC tooling, and aerospace-grade pre-preg carbon fiber manufacturing . Our autoclave curing process creates lighter, stronger, and more consistent carbon fiber parts with exceptional weave quality and OEM-level fitment. Every product is designed to deliver premium craftsmanship, performance, and durability for enthusiasts who demand the best.
Featuring a double-sided gloss carbon fiber construction, these rear side diffusers showcase exposed carbon fiber on both the exterior and interior surfaces for a premium appearance from every angle. Designed as a direct replacement for the factory rear side trim, they utilize OEM mounting locations for a precise, factory-style installation.
OEM-style mounting locations for precise installation
| SKU | Vehicle or component application | Fitting requirements |
|---|---|---|
| AA_G80_HD372_PRO | 2021–2026 BMW M4 G82 2021–2026 BMW M4 G83 Convertible | Check the component details and original equipment before fitting. |
Delivery is quoted for this product. Contact Hoonies for a delivery quote and confirmation of availability before ordering.
For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. For customers outside the UK, local customs and taxes remain your responsibility, and shipping is shown at checkout. If a shipping option is not available, email us and we will prepare a tailored quote.
Many of the products we sell are made to order, imported or custom built, so a lead time may apply. If you need a part urgently, contact us before ordering and we will confirm the expected delivery timeframe and process.
Model year, engine, drivetrain, hardware and existing modifications can all change what fits. Check the applications and supplier notes above, or send us your exact vehicle and setup before ordering.
Send us your vehicle, year, current setup and any fitting date, event, trip or deadline before ordering. We will help check fitment, product choice and timing.
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