Signature Composites
G8X M3/M4 AK-Style Carbon Diffuser
Installation included at our Dallas–Fort Worth shop — you pay for the part, not the labor.
Request Your InstallPart of a Build Kit
G8X M3/M4 Signature Carbon Kit Builder
Build it your way — choose the carbon parts that complete your G8X
$3,208.43 $3,564.93 10% OFF · Save $356.50
Transform the lower rear of your G8X M3/M4 with an AK-style carbon fiber diffuser featuring an integrated brake light. Designed with a more aggressive profile, it adds depth and definition to the rear bumper while complementing the vehicle’s factory lines. The integrated brake light adds an additional motorsport-inspired touch for a more distinctive rear-end appearance.
- Genuine carbon fiber construction
- AK-style design
- Integrated brake light
- OEM-style fitment
- UV-protective clear coat
- Lightweight and durable finish
A bold rear-end upgrade that combines aggressive carbon styling with an integrated brake light, delivering a more distinctive, performance-focused appearance.
SKU SC.G8X.CF.DFR.AK
Will this fit my car?
Check the fitment information below for supported years and models. Not sure? Contact us with your exact year, make, and model and we'll confirm fitment before you order.
Do you offer installation?
Yes — we're a full-service shop in the Dallas, TX area. Reach out after ordering and we'll get your install scheduled.
What if I need to return or exchange a part?
See our Returns & Exchanges page for full details, or contact us and we'll make it right.
- BMW G80 M3 2021–2027
- BMW G82/83 M4 2021–2027
Complete Your Build
