OD:1.540
ID:.1.020
Hyd. Spring
Max Lift: .545
Spring Type: Single W/Damper
Seat Pressure: 110/1.850
Open Pressure: 305/1.300
Coil Bind: 1.250
Herbert Valve Springs are manufactured from the highest quality materials and are inspected during every step of manufacturing to insure the kind of performance you would expect.