GFB Mach 2 TMS Recirculating Diverter Valve - 25mm Inlet/25mm OutletALL THE PERFORMANCE WITH OR WITHOUT THE NOISE!, GFB's Mach 2 utilises GFB's proven TMS Technology to ensure rapid boost recovery on gearshift and optimum throttle response, as well as the ability to withstand boost pressures of 100psi+. Put simply, it can hold more boost than any turbo could produce This Part Fits: Year Make Model Submodel 1997 2005 Audi A4 Base 2003 2006 Audi A4 Cabriolet 2000 2006 Audi TT Base 2003 Saab 9 3 Arc 1999 2001 Saab 9 3