TSP .660" Dual Valve Spring Kit

The Texas Speed & Performance TSP .660" Dual Valve Spring Kit is a high-performance valvetrain upgrade designed for aggressive applications. This kit features American-made PAC Racing polished dual valve springs, renowned for their durability and stability, offering excellent control even with demanding hydraulic roller camshafts. The polishing process by PAC Racing significantly extends spring life and minimizes the chances of fatigue and failure, all while preserving the springs' full pressure capabilities. Key components include titanium retainers and the innovative, patent-pending Precision Race Components integrated seat and seal. This integrated design eliminates the need for special installation tools for valve seals, preventing tearing during installation and ensuring seals do not pop off. This valve spring kit is rated to .660" lift and includes PAC valve springs, titanium retainers, and the integrated seat/seal. The kit utilizes GM factory valve stem locks, which are not included. Spring specifications include an install height of 1.810", 160 lb. closed spring pressure at that height, 415 lb. open spring pressure at .660" lift, a maximum spring lift of .660", and a coil bind at 1.015". The Texas Speed & Performance TSP .660" Dual Valve Spring Kit fits a wide range of LS engine applications, including LS1, LS2, LS3, LS6, L99, LSA, L92, L9H, L94, L76, L77, LY6, L96, LFA, LZ1, LY5, LMG, LMF, LH6, LC9, LY2, L20, L33, LQ4, LQ9, LR4, LM7, L59, LS4, LH8, and LH9. It is important to note that this kit will not work on LS7, LS9, any Gen 5 LT1/4 engine applications, and most aftermarket cylinder heads with bronze guides.