PAC-1575-16 1500 Series Dual Valve Springs Spring OD: 1.409

1500 Series Dual Valve Springs Spring OD: 1.409 Pac 1500 series valve springs offer an industry leading nitriding process that allows for the material to withstand the abusive wear and fatigue of the typical endurance engine environment. These springs come fully prepared for racing conditions with chamfering, polishing, and the latest surface enhancement technology available. From 24 hours of Lemans to the rigors of NASCAR the 1500 series spring has the history to withstand this environment. 1500 Series Circle Track Valve Springs 1500 Series Dual Valve Springs Spring OD: 1.409 Spring ID: 0.700 Seat Pressure: 150 LBS @ 2.000 Open Pressure: 645 LBS @ 1.150 Spring Rate: 582 Max Coil Bind: 1.110 Max Lift: .850 16/pkg