COMP Cams Hustler Valve Springs are an improved version of the popular GM LS6 "blue" valve spring. They are based on popular GM part #12499224 and #12565313 LS6 springs but with 4% higher seat and open loads for better dynamic control, as well as an extra .020" of lift capability. They are an excellent performance upgrade in GM 603/604 and CT525 LS crate Race Applications with tight rules packages.
- ClearanceItem:N
- Engine Components>Valve Springs- Retainers
- EPA:N/A
- LTL:N
- MPN:H604-16
- Non-CARB:N
- Prop65:Y
- SpecialOrder:Y