Upgrade your GM LS-series engine with the Melling VSK46673T valve spring kit, designed for optimal performance and durability. This kit features dual springs with a spring rate of 377 lb/in, providing excellent control and stability for high-performance applications. The springs are engineered with a coil bind of 1.102 inches, ensuring reliable operation under demanding conditions. The outer diameter measures 1.295 inches, making it compatible with a wide range of LS engine configurations. Included in the kit are locks, titanium retainers, and seals, offering a comprehensive solution to enhance your engine's valve train. These components are built to withstand high stress and temperatures, contributing to improved longevity and performance.