GSC Power-Division Single Valve Spring and Ti Retainer Kit Gen3 3SGTE that uses SHIM UNDER Bucket. The GSC5746 kit utilizes a nano peened round wire spring that can handle 8200 RPM and 32PSI Boost with our Titanium Retainer. This spring kit can be used with either the S1 or S2 profile(or similar)
Pressure @ Spring Height 72Lbs @ 1.354" 195lbs @ .919"