APR R1 Diverter Valve For Audi TT 8N / S3 8L / Leon Cupra 1M / S4 B5 / RS4 B5

Designed to withstand high pressures without risk of failure, this APR R1 diverter valve fits without modification on the 1.8T 20V engines of the Golf 4 GTI, Leon 1M Cupra, S3 8L or TT MK1 but also on the 2.7T engines of the Audi S4 B5 and RS4 B5. Featuring inlet and outlet diameters of 1" / 2.54mm, this recirculating diverter valve can also be adapted for mounting on other engines. Built in aluminum around a reinforced Nomex diaphragm, this high performance diverter doesn't requires any kind maintenance and presents no risk of sticking or binding like pistons based designs.