MillTek Audi RS4 Active Valve Control (2019-2021) performance friction have superior heat resistance

have superior heat resistance

Make significantly more power than cat bypass pipes

We saw an increase of 15 whp and 13 ft/lbs of tq at 5700 RPM when tested on our in-house dynojet

Replaces the factory rear muffler with a lighter-weight free-flowing performance exhaust system for increased performance and sports car sound

MillTek Audi RS4 Active Valve Control (2019-2021) performance friction have superior heat resistanceActive Valve Control (AVC) is available to support both vehicles equipped with factory valves on the exhaust as well as a growing range of upgrades Milltek Sport offers to have performance exhaust systems with Valve Control. Also with optional App control on selected models, via iPhone or Android smartphone apps, AVC brings total control of the exhaust to the drivers finger tips, via full CAN BUS integration with built in safety controls, Milltek's