1.274 Dual Valve Spring GM LS (1)

The 1.274 Dual Valve Spring GM LS (1) is engineered to meet the rigorous demands of high-performance General Motors LS engine platforms. Designed by PAC Racing Springs, this component provides the essential tension required to maintain valvetrain stability during aggressive driving conditions and high-RPM operation. Engine builders utilize these springs to prevent valve float, ensuring that the engine maintains peak power throughout the entire power band. Whether you are upgrading a street machine or building a dedicated track car, these springs offer the reliability needed for extreme duty cycles.

Utilizing a sophisticated dual-spring architecture, this 1.274 Dual Valve Spring GM LS (1) provides a redundant safety layer while significantly increasing the seat and open pressures compared to factory single-spring setups. The 1.274-inch outer diameter is optimized for fitment in standard LS cylinder head spring pockets, allowing for easier integration into existing valvetrain configurations. PAC Racing employs advanced metallurgy and processing techniques to ensure high fatigue resistance and minimal load loss over time. This design allows for the use of high-lift camshafts without compromising the structural integrity of the valvetrain.

Performance enthusiasts will find the 1.274 Dual Valve Spring GM LS (1) to be a critical upgrade when installing aftermarket camshafts or forced induction systems on LS1, LS2, LS3, or LS6 engines. Proper installation ensures that valves close rapidly and remain seated, which is vital for maintaining compression and preventing catastrophic engine failure. Given the specific 1.274-inch diameter, these springs should be paired with compatible retainers and seats to achieve the correct installed height. This component is a staple for those seeking a durable valvetrain solution that can withstand the pressures of modern racing environments.