TSP .660" Polished Dual Spring Kit with Titanium Retainers

The Texas Speed and Performance TSP .660" POLISHED Dual Spring Kit represents an advancement in valve spring technology, offering enhanced valvetrain control suitable for aggressive hydraulic roller camshafts. The inclusion of lightweight and durable titanium retainers further contributes to the kit's performance and longevity. A key innovation in this kit is the patent-pending Precision Race Components integrated seat and seal. This design simplifies installation by eliminating the need for special tools and reduces the risk of tearing or dislodging valve seals. The integrated seat and seal are compatible with factory-size valve guides but cannot be used with aftermarket bronze guide applications. The specifications include a maximum spring lift of .660", an install height of 1.810", 160 lb. of closed spring pressure at the installed height, and 415 lb. of open spring pressure at maximum lift. The coil bind is rated at 1.015". Important compatibility notes: This dual valve spring kit utilizes GM factory valve stem locks, which are not included. It will not work on LS7, LS9, any Gen 5 LT1/4 engine applications, and most aftermarket cylinder heads with bronze guides.