Isky Racing Cams 9315: Standard Dual Valve Spring Set OD: 1.550 in.
1.550 in. OD
Standard Dual Valve Spring Set Outer OD/ID: 1.550 in./1.135 in. Inner OD/ID: 1.025 in./.740 in. Seat Load: 210 lbs. at 1.900 in. Open Load: 520 lbs. at 1.240 in. Coil Bind Height: 1.130 in. Rate: 480 lbs