Manley Performance Valve Springs -1440 Polished

- Drag Race, Oval Track & Endurance Valve Springs

- No degradation of spring pressure in the later stages of a race

- Specially processed premium-grade chrome silicon that is virtually free of impurities or surface irregularities

- NexTek Series valve springs have been tested by leading engine builders and are confirmed to be the best performing valve springs on the market today

- Solid Roller

- Maximum Valve Lift .700

- O. D. 1.570 Double With Dampe

- I.D. .760

- Installed / Open Pressure 255 @ 2.000

- Rate lbs./in. 534

- Coil Bind 1.190

- Weight (grams) 165