GM LS Dual Valve Spring Kit .660 Dia.

The GM LS Dual Valve Spring Kit .660 Dia. from CAM MOTION INC is an essential upgrade for serious LS engine builders and performance enthusiasts seeking reliable valve control in high-RPM applications. This dual valve spring assembly is engineered for stock and modified GM LS-series engines, delivering the consistent spring pressure needed to maintain proper valve seating and prevent float when running aggressive cam profiles.

The .660-inch diameter specification indicates these springs are designed for compatibility with LS-platform cylinder heads, ensuring precise fitment. The dual-spring design provides two distinct spring rates working in concert—the outer spring handles peak load and controls valve float at high RPM, while the inner spring reduces mass and improves response during low-speed operation. This architecture minimizes unwanted harmonics and extends valve train component life.

LS engine builders installing aftermarket camshafts will benefit from the consistent spring rates across the kit, which is critical for eliminating cylinder-to-cylinder variations that compromise idle quality and power delivery. Whether you're building a street machine or a track car, upgrading your valve springs is fundamental to unlocking your cam's full potential without risking catastrophic valve train failure.