1.485 Valve Springs/ Locks & Retainer Kit

The 1.485 Valve Springs, Locks & Retainer Kit from Howards Racing Components is designed for serious engine builders and performance enthusiasts who require precise valve train control at high RPM. This comprehensive kit provides essential components for managing aggressive valve events in modified gasoline engines, making it suitable for both street-strip hybrids and dedicated race motors.

Featuring a 1.485-inch spring diameter, this kit strikes the ideal balance of seat pressure and open pressure for engines with moderate to aggressive cam profiles. Howards Racing Components manufactures these springs from high-carbon alloy steel, which is heat-treated to stringent standards to prevent issues such as coil bind and premature fatigue during high-load cycling. The kit includes matched valve spring seats, locks (keepers), and retainers, all calibrated to work together to maintain consistent valve lift and prevent float.

This kit is particularly beneficial for small-block engines equipped with aftermarket heads or factory castings that have been prepared for performance use. Proper seat pressure is crucial; too light can lead to valve float, while too heavy can accelerate wear on cam lobes and rocker arms. The retainer design minimizes rotational friction, and the dual-lock keepers provide added security against valve train separation during extreme acceleration or deceleration.