034Motorsport Stainless Steel Racing Catalyst, B9 Audi S4/S5 Button This essentially creates a pivot

This essentially creates a pivot point for the diff under torque loading

All mounting bosses and surfaces are in-house precision CNC machined and hand-verified for an exact fit

UP TO65% MORE FLOWWITH TURBO INLET

EC Approved with GT-90 Cerakote Black Trim – Cat-back by Milltek

034Motorsport Stainless Steel Racing Catalyst, B9 Audi S4/S5 Button This essentially creates a pivotProduct Description: The 034Motorsport Stainless Steel Racing Catalyst for B9 Audi S4 S5 is designed as a drop in replacement for the restrictive factory catalytic converter. The Stainless Steel Racing Catalyst offers increased horsepower and torque throughout the powerband, reduced turbocharger lag, improved throttle response, and an enhanced exhaust note. This upgrade eliminates the primary flow limitation in the factory exhaust system, allowing you