GFB Mach 2 TMS Recirculating Diverter Valve - Subaru 99-00 WRX/STi/B4 Legacy / 98-04 GT/XT Forester Interior Accessories>Quick Release Adapters Build the ultimate tune for

Build the ultimate tune for your S63tu powered vehicle and go from stock to full race calibration

7L Dodge Cummins

A tune and increased boost pressure are usually one of the first mods done

and out in the field to ensure the components and calibration deliver consistent performance in all conditions

GFB Mach 2 TMS Recirculating Diverter Valve - Subaru 99-00 WRX/STi/B4 Legacy / 98-04 GT/XT Forester Interior Accessories>Quick Release Adapters Build the ultimate tune forALL 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