1.638 Dia. H-11 Dual Valve Springs- .760 ID.

The COMP Cams 1.638 Dia. H-11 Dual Valve Springs with .760 ID represent precision engineered valvetrain components built to manage demanding engine dynamics. These dual-spring assemblies are engineered for high-rpm stability and consistent valve control across extended operating ranges, making them essential for serious engine builders and performance technicians working on both street and race applications.

Specification details establish the performance envelope: a 637.5 lb/in spring rate provides the stiffness required for reliable valve seating at elevated rpms, while the 1.100-inch coil bind specification prevents over-compression and internal spring damage. The 1.546-inch outer diameter and .760-inch inner diameter work within H-11 tool steel construction, a material choice that resists fatigue and thermal stress over extended duty cycles. This set includes 16 springs—sufficient for a complete eight-cylinder engine build. The dual-spring design itself delivers superior harmonic control compared to single-spring arrangements, reducing valve float and extending component longevity at high rpm.

COMP Cams valve springs serve engine builders, professional machine shops, and enthusiasts performing complete valvetrain upgrades or race engine assembly. These components are specified when original equipment springs cannot support increased lift profiles, higher engine speeds, or aggressive cam timing requirements. Proper spring selection is critical—undersized or worn springs lead to valve float, misfire, and catastrophic engine damage, making OEM-equivalent or performance-grade replacements non-negotiable during major rebuilds.

Valve spring engineering demands precision tolerances and fatigue-resistant materials. The H-11 steel used here is recognized across the performance engine industry for consistent performance across thermal cycles and high-load applications. Buyers should verify compatibility with their specific camshaft profile, rocker arm geometry, and head casting before installation—spring rate, installed height, and diameter must align with the complete valvetrain system to ensure reliable operation.