This 034Motorsport Stainless Steel Racing Catalyst Set for the B9 Audi RS4/RS5 offers a raw, loud tone and high-flow, allowing for a road-legal racer's experience. The set is carefully crafted from stainless steel with a protective heat shield for the best performance and reliability.

 

Fits 2.9TT Audi RS4/RS5 B9/B9.5