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" (EU: 1,524 cm) spring sets are 1.460" (EU: 3,708 cm) OD and have a pressure of 125 lb. (EU: 56,70 kg) when closed and 275 lb. (EU: 124,74 kg) at 0.500" (EU: 1,27 cm) lift; installed height should be 1.800" (EU: 4,572 cm); coil bind occurs at 1.150" (EU: 2,921 cm) Sold in a set of four springs (enough for one engine) Made in the U.S.A.. 600" SPRING SET EVO BT
