1.320 Dual Valve Springs GM LS Engines

The 1.320 Dual Valve Springs for GM LS Engines are engineered for high-performance applications where valve control and reliability matter most. Designed by COMP Cams, an industry leader in valve train components, these dual springs address the critical demands of modified LS platforms—whether you're building a street machine, race engine, or high-revving project. As an LS engine enthusiast, you know that factory valve springs quickly become the limiting factor when adding aggressive camshafts, increasing boost pressure, or pushing RPM limits beyond stock parameters.

Dual valve spring designs provide superior control over valve motion across the entire RPM range by combining an outer and inner spring with different rates and preload characteristics. This configuration resists valve float—the dangerous condition where springs lose control of valve timing at high RPM—while reducing stress on valve seats and rocker arms. The 1.320 spring diameter sits at the sweet spot for LS applications, offering compatibility with both factory and aftermarket valve spring seats without requiring costly machine work or seat upgrades. COMP Cams engineers these springs from high-quality steel with precise wound geometry and stress-relieved heat treatment, ensuring consistent preload pressure and longevity even under sustained high-lift, high-RPM operation.

These springs suit anyone upgrading beyond factory power levels—tuners installing larger cams, supercharger or turbo builders chasing cylinder pressure control, and drag racers demanding absolute valve stability at 7000+ RPM. They're a direct fit for LS1, LS2, LS3, LS6, and related LS-family small-blocks when paired with compatible valve lifters and pushrods. Installation requires removing the valve cover, rocker arms, and pushrods; a valve spring compressor makes the job straightforward for experienced mechanics. Verify seat pressure and installed height with a spring pressure checker after installation to confirm proper preload and avoid harmony issues with your specific camshaft and valve train geometry.