1300 Series Dual Valve Springs, Spring OD: 1.625, Spring ID: 0.851, Seat Pressure: 275 LBS @ 2.000, Open Pressure: 810 LBS @ 1.150, Spring Rate: 629, Max Coil Bind: 1.100, Max Lift: .850, 16/pkg|PAC Racing Springs 1300 Series Dual Valve Springs Spring OD: 1.625.
