As opposed to dualcylindrical spring systems,COMP Cams Dual Conical ValveSprings require nointerference fit to dampenspring surge. The self dampingcharacteristic of conicalgeometry, along with the lowerspring kinetic energy of theupper coils, provide agame-changing breakthrough invalve spring design. COMPCams Dual Conical ValveSprings are constrained at thetop and bottom with steppedretainers and spring seats tocreate separation. The resultis that the springsnaturally progressive naturecan provide outstandingdamping without rubbingfriction or the associatedheat and surface damage. Thesesprings are designed forcircle track, road race anddrag racing applications, aswell as all-out, high-RPMstreet/strip hydraulic rollervalve train systems withoptimizedlifters.