B8.5 Carbon Fiber Rear Vertical LED Diffuser V4 | Audi B8.5 A5 S-Line, S5 | Canadian Auto Performance

Overview

Carbon Fiber Rear Diffuser V4 – Vertical LED | For 2013–2017 Audi A5 S-Line / S5 (B8.5) Introducing the highly anticipated V4 Carbon Fiber Diffuser , a 2025 release from Can Auto Performance — now featuring our signature vertical LED brake light . This updated version delivers refined styling and elevated performance looks, combining high-grade carbon fiber craftsmanship with bold, distinctive detail for the B8.5 Audi A5/S5.

Details

• Building on the success of our V1 and V2 models, the V3 takes styling and functionality to the next level.
• While the V1 diffuser featured a bold, aggressive look and the V2 offered a more refined, subtle design , the V4 strikes the perfect balance with enhanced contours and an integrated vertical LED brake light — a first in our diffuser lineup.
• Crafted from high-quality hand-laid carbon fiber, the V3 is engineered to stand out.
• Wiring Instructions Red is the live wire.
• Black is the ground wire.
• Yellow is the brake light wire.
• IMPORTANT NOTE FOR INSTALLATION DISCLAIMER: Professional install of this carbon diffuser by someone who has aftermarket product experience is required.
• Rear bumper is required to be removed to install this carbon fiber diffuser properly.
• Self tapping screws must be used in corners and/or tabs to keep diffuser secure.

Fitment Notes:

• This does not fit the B8.5 A5 Non S-Line

Fitment