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OD:1.550
ID: .750
Hyd./Solid
Max Lift: .725
Spring Type: Dual W/Damper
Seat Pressure: 150/1.940
Open Pressure: 500/1.200
Coil Bind: 1.150

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.