SIngle valve spring with 65 seat pounds, 130 pounds @ .500 max lift. For use with stainless steel valves up to 7500 rpm or titanium 19500+ rpm. Springs are sold in sets of 4.

NOTE*** never use performance valve springs with stock valves. Stock valve failure is common. Always run a clearance of .060’’ between max lift and coil bind

These springs require a taller install height and must be used with our valves. Will not work with stock length valves