Manley Performance Lightweight Dual Drag Race Valve Springs -1.500

- Higher natural frequency and lower active mass provides improved valvetrain control and higher RPM potential
- Dual spring design reduces friction, which generates less heat and translates into greatly reduced load loss
- Extensively tested on the Spintron, dyno and race track (including blown nitro engines) and proven highly effective
- Smaller diameter, lightweight dual design allows engine to rev higher with improved valve train control
- Accepts smaller, lighter retainers which also promotes higher revs
- Ultra clean, high tensile strength chrome silicon material
- Super Finished multi-step surface enhancement significantly improves fatigue strength
- Ideal loads for multiple applications with minimal load loss

- Super Stock

- Maximum Valve Lift .850

- O. D. 1.500

- I.D. .710

- Installed / Open Pressure 275 @ 2.050

- Rate lbs./in. 780

- Coil Bind 1.130

- Weight (grams) 136