RCM Billet Tumbler Generator Valve (TGV) Delete Kit 2001 - 2007 WRX/STI & STI 2014+ 52321-SNA-A01 The design features a thicker

The design features a thicker inner rim compared to the standard G025 to reduce road noise and increase the load capacity up to 900 kg to cater for the increasing weight of modern vehicles

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

however here at SPOON we decided to develop the cleaner with the genuine airbox

Made from 7076 T6 Aluminium

The 19″ version offers two face designs: S-TD and GTR

RCM Billet Tumbler Generator Valve (TGV) Delete Kit 2001 - 2007 WRX/STI & STI 2014+ 52321-SNA-A01 The design features a thickerTumbler 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