Description Description Spring Shims for all STM power valves that do not have the cap with the red adjuster nut View AllClose
Add to Cart Quick view Power Valve Spring Kit MSRP: Now: $47.00 Was: Three different spring rates to choose from in the kit. Springs fit all Piston and Bellow style Supreme exhaust valve assemblies. Gives the option of fine tuning the opening rpm of your valves...
Add to Cart Quick view Power Valve Spring (Sold Individually ) MSRP: Now: $7.00 Was: Sold individually
Add to Cart Quick view STM TRA Spring Spacer MSRP: Now: $15.00 Was: TRA spring spacer for the STM Rage primary clutch. These spacers go in each end of the TRA spring to protect the cover and spider from spring damage.