Audi B5 S4 Genuine VW/Audi 710N Diverter Valve
Keep your boost inside the intake where it belongs, and cure common driveability concerns with this stronger, more durable VW/Audi valve, suitable for stock or mildly tuned cars.
Diverter valves live in a tough neighborhood. By definition, they limit turbo boost, and most eventually fail due to a pin hole or tear in the valve diphragm.
Symptoms vary, but commonly include rough idle, a loss of power, or an illuminated check engine light.
Easy to install, you'll need one sooner or later, so be prepared.
Keep Your Boost Where It Belongs
Fits:
Audi B5 S4 (2000-2002)