Incorporate an interference double-spring design with a damper to control harmonics
Engineered for maximum performance in severe applications such as high compression and big-inch street motors
.600 spring sets are 1.460 o.d. and have a pressure of 125 lb. when closed and 275 lb. at .500 lift; installed height should be 1.800 ; coil bind occurs at 1.150
.675 spring sets are 1.510 o.d. and have a pressure of 184 lb. when closed and 422 lb. at .570 lift; installed height should be 1.850 ; coil bind occurs at 1.080
Sold in a set of four springs (enough for one engine)