Audi A4 S-Line / S4 B9 Rear Diffuser – Prepreg Dry Carbon Fiber (2020–2021) Shipping Option:Air Freight (1-2 Weeks) Our switch is versatile

Our switch is versatile

Premium Bull Boost Performance AN6 valve cover vacuum adapter

OEM-Style Carbon Fiber Emblem Overlay(s)

The product has a limited 90-day paint warranty

Some modification might be required

Audi A4 S-Line / S4 B9 Rear Diffuser – Prepreg Dry Carbon Fiber (2020–2021) Shipping Option:Air Freight (1-2 Weeks) Our switch is versatileIf you're building your B9 the right way, the rear end matters just as much as the front. This Prepreg Dry Carbon Fiber Rear Diffuser is designed to give your Audi A4 S Line or S4 a sharper, more aggressive finish that completely transforms the rear profile. The 3D contoured design adds depth, dimension, and true performance inspired styling giving your build that finished, high end look it deserves. Crafted using advanced prepreg dry carbon