Audi A4 B9 S-Line / S4 Rear Diffuser – Prepreg Dry Carbon Fiber (2020–2022 Sedan) Door Locks (Fit All Models Above With

(Fit All Models Above With Composite Headlights Only

and everything needed for a clean

The precision TIG-welded and ported 4-1 merge collector promotes smooth exhaust flow and improved exhaust gas velocity into the turbocharger

and deliver a more aggressive induction sound — all while maintaining daily drivability

Audi A4 B9 S-Line / S4 Rear Diffuser – Prepreg Dry Carbon Fiber (2020–2022 Sedan) Door Locks (Fit All Models Above WithThe rear end of your B9 deserves the same attention as the front. This Prepreg Dry Carbon Fiber Rear Diffuser for the Audi A4 S Line and S4 Sedan delivers aggressive styling with precision fitment, giving your build that refined performance look without going over the top. Designed to enhance the factory rear bumper lines, this diffuser adds depth, sharp edges, and true motorsport inspired presence. Constructed using advanced prepreg dry carbon and