Valve Spring, Single w/damper

High-pressure Valve Springs can be used on exhaust and intake valves for all high-performance applications. They feature a shorter, fully-compressed height and allow for increased valve lift. Springs maintain spring load at higher rpms. A must for high-performance cams. Sold individually. With a single spring, the damper is installed inside the main spring: with a dual spring, the damper is installed between the inner and outer springs. There are no dampers in the triple springs. The retainers listed are the basic recommendation. Check the actual retainer listing for other options: added installed height, materials and lock size