This Conical Valve Spring Kit from COMP Cams contains springs, retainers, locks and seals. With a unique cone shape, the springs in this kit were specifically designed for Small Block Chevrolets with up to .500” lift but require no machining to the spring pockets. Extensive quality assurance testing ensures your new Conical Valve Springs are free of any microscopic surface defects for optimum strength and durability. PartNumber : cca7228TS-KIT Description : Conical Valve Spring Kit Title : 7228TS-Kit Kit, Conical Valve Spring, TS, LS Type Installed Pressure (lbs.) : N/A Camshaft Type : N/A Spring Rate (lbs./in.) : 438 Inside Diameter : N/A Open Height (in.) : N/A Open Pressure (lbs.) : N/A Installed Height (in.) : N/A Position : N/A Spring Type : Single Engine Components::Valve Springs, Retainers