.660" Polished Dual Spring Kit with Titanium Retainers

The Texas Speed & Performance TSP .660" POLISHED Dual Spring Kit represents the latest in valve spring technology, designed to offer superior valvetrain control for demanding applications, including aggressive hydraulic roller camshafts. This kit utilizes American-made PAC Racing polished dual valve springs, known for their durability and increased lifespan due to the polishing process that prevents spring fatigue and failure without sacrificing pressure. Key components of this kit include titanium retainers for reduced mass and improved performance, along with a patent-pending Precision Race Components integrated seat and seal. This innovative design eliminates the need for specialized installation tools for valve seals, reduces the risk of tearing seals during installation, and prevents valve seals from popping off. Specifications for this kit include an install height of 1.810", with closed spring pressure of 160 lb. at that height. The open spring pressure reaches 415 lb. at .660" of lift, which is also the maximum recommended spring lift. The coil bind is at 1.015". Important compatibility notes: This kit will not work on LS7, LS9, any Gen 5 LT1/4 engine applications. It is also incompatible with most aftermarket cylinder heads that utilize bronze guides. The kit utilizes GM factory valve stem locks, which are not included. For those seeking enhanced performance and reliability, this valve spring kit offers a robust solution for specific LS engine applications.