Description
Upgrade the rear styling of your 2013–2016 Audi A4 S-Line or Audi S4 (B8.5) with the Canadian Auto Performance CAP Carbon Fiber Rear Vertical LED Diffuser V4. Released in 2025, the V4 introduces Canadian Auto Performance’s signature integrated vertical LED brake light, combining premium carbon fiber construction with an aggressive, modern rear-end appearance.
Building on the successful V1, V2, and V3 diffuser designs, the V4 Carbon Fiber Rear Diffuser takes the styling and functionality of the B8.5 Audi A4/S4 to the next level. The V1 featured a bold and aggressive appearance, while the V2 delivered a more refined and subtle design. The V4 strikes a balance between both approaches with enhanced contours, distinctive styling, and an integrated vertical LED brake light, making it the first diffuser in the lineup to incorporate this vertical LED feature.
The diffuser is crafted from high-quality hand-laid carbon fiber, providing a premium motorsport-inspired finish while adding a distinctive visual upgrade to the rear of the vehicle. The integrated vertical LED brake light further enhances the diffuser's appearance and provides an additional functional lighting element.
Wiring Instructions
- Red: Live wire
- Black: Ground wire
- Yellow: Brake light wire
Vehicle Fitment
- 2013–2016 Audi A4 S-Line (B8.5)
- 2013–2016 Audi S4 (B8.5)
Fitment Exclusion
- This diffuser does not fit the B8.5 Audi A4 Non-S-Line.
Upgrade your 2013–2016 Audi A4 S-Line or S4 B8.5 with the Canadian Auto Performance CAP V4 Carbon Fiber Rear Diffuser featuring an integrated vertical LED brake light and hand-laid carbon fiber construction. Does not fit B8.5 A4 Non-S-Line.
