Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The Turbosmart Kompact Plumb Back diverter valve is a full recirculating BOV engineered for 1997–2006 Audi A4 1.8T 20V and 1999–2003 Audi S3 1.8T 20V applications. Its plumb-back design returns excess boost pressure into the intake to maintain sealed charge and provide reliable, unobtrusive operation for turbocharged Audi setups where a quiet, factory-style response is preferred.
Turbosmart 97-06 Audi A4 1.8T 20V / 99-03 Audi S3 1.8T 20V Kompact Plumb Back Diverter Valve (25mm)
