quick view Add to Cart Go Fast Bits GFB Mach 2 TMS Recirculating Diverter Valve - Subaru 99-00 WRX/STi/B4 Legacy / 98-04 GT/XT Forester - T9100 MSRP: $422.99 ALL 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 100 psi plus. Put simply,... Add to Cart Add to Wish List Add to My Wish List Create New Wish List Compare