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Signature Composites

G8X M3/M4 Diffuser Trim

G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
G8X M3/M4 Diffuser Trim
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$494.99 $549.99 10% OFF · Save $55.00
Made to order — ships in 6-8 weeks
1
Fitment guaranteed or your money back
Returns & exchanges available
Built to spec — OEM-grade quality
Free Install — Limited Time Only

Installation included at our Dallas–Fort Worth shop — you pay for the part, not the labor.

Request Your Install

Part 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

Build Kit

Add a subtle, factory-inspired touch to the rear of your vehicle with an OEM-style dry carbon fiber diffuser trim. Designed to complement the existing diffuser, it enhances the lower rear styling with genuine carbon fiber while keeping the original lines clean and understated.

  • Genuine dry carbon fiber construction
  • OEM-style design and fitment
  • UV-protective clear coat
  • Lightweight and durable finish
  • Enhances the factory rear diffuser without altering its overall design

A refined carbon fiber detail that delivers a more premium, performance-inspired look while maintaining an OEM appearance.

SKU SC.G8X.CF.DFR.TRM

Vehicle Fitment