RCM Billet Tumbler Generator Valve (TGV) Delete Kit 2001 - 2007 WRX/STI & STI 2014+ 52321-SNA-A01 Made from 7076 T6 Aluminium

Made from 7076 T6 Aluminium

The ring machining process of the original TC-4 is continued

The wastegate has a spring that is set at a certain pressure and boost is controlled by over pressurizing the spring allowing the actuator to open and bypass hot exhaust gases around the turbine

HKS GT III turbo is designed with the optimal blade diameter to utilize the best turbo efficiency to achieve 100hp and reduce the exhaust pressure and intake air temperature

Spring mechanism naturally weakens over time

RCM Billet Tumbler Generator Valve (TGV) Delete Kit 2001 - 2007 WRX/STI & STI 2014+ 52321-SNA-A01 Made from 7076 T6 AluminiumTumbler Generator Valves (or "TGV" as they are most commonly referred to) can be found on Impreza WRX, Forester Turbo and Legacy GT models from 2001 onward. Their prime purpose is to reduce emissions from cold idle to meet standards governed by the EU emissions regulations (similar regulations also exist for both the US and Japan). Whilst this may be good for the environment it does little to aid the performance of your car and it's not uncommon for