Manley valve springs are wound from super clean alloy. Each design minimizes stress to ensure long service life with high lift camshafts. Retainers are manufactured in our own double spindle CNC machines to exacting tolerances and precise installed height specifications.
Max Net Lift: 0.580″
Seat Pressure: 66 @ 1.580″
Open Pressure: 175 @ 1.210″ & 237 @ 1.000″
Stock/Max Lift: 0.370″ / 0.580″
Coil Bind: .950″
Rate (lbs./in.): 294