Manley Performance Drag Race, Oval Track & Endurance Valve Springs -1.620 Double

- 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 .800

- O.D. 1.620 Double Without Damper 

- I.D. .852

- Installed / Open Pressure 280 @ 2.050 / 680 @ 1.250

- Rate (lbs/in.) 500

- Coil Bind 1.200

- Weight (grams) 168