Product description
Upgraded Duramax Valve Spring Supports 50+ PSI and 4000RPM. Closed load 75# @1.900, installed 150#@ 1.400 128# @ 1.500" Coil bind height: ~1.195 Better valvetrain stability.
- Reduced risk of valve float or recession.
- Suitable for mild-to-moderate performance builds.
- Direct drop-in
- Stock springs: Generally reliable up to ~35-45 psi boost (varies with condition, RPM, drive pressure, and tune). Valve float risks increase significantly beyond that, especially combined with 3,500+ RPM.
- Upgraded springs will support higher boost (Approx 50 psi) and allow safer operation at RPMs 4,000+ RPM) before float becomes an issue. It helps maintain valve control under higher cylinder pressures. Exact gains depend on your specific setup (cam, retainers, valves, tune, fuel, etc.). Many Duramax performance kits aim for 60+ psi capability with upgraded springs.