High-flow downpipe dedicated to the Audi S4 B9 3.0 TFSI.
The modification of the front part of the exhaust system significantly reduces exhaust back pressure, which translates to an increase in the car's power. The downpipe is equipped with a sports catalytic converter from HJS with a density of 300 CPSI (a straight-through De-cat version is also available).
The element is made of stainless steel. Designed to connect with the Milltek Sport Cat-back exhaust or the stock system. When replacing the downpipe, it is recommended to modify the engine control unit (ECU) and adjust its operating parameters to accommodate the increased exhaust flow.
