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.
OD: 1.550
ID: .745
Roller Spring
Max Lift: .745
Spring Type: Dual W/Damper
Seat Pressure: 215/2.000
Open Pressure: 550/1.255
Coil Bind: 1.195