Valve Spring Kit - Evolution - Big Twin
Incorporate an interference double-spring design with damper to control harmonics
Engineered for maximum performance in severe applications such as high compression and big-inch street motors
0.600" spring sets are 1.460" OD and have a pressure of 125 lb. when closed and 275 lb. at 0.500" lift; installed height should be 1.800"; coil bind occurs at 1.150"
Sold in a set of four springs (enough for one engine)
Made in the USA