Manley Performance Drag Race Valve Springs -1.650 Double

- Unequalled performance

- All springs are triple except 221424, 221425 & 221454 which are double w/o damper

- Better valve train stability and component life

- Ideally suited for Sportsman Drag Racing applications

- Sportsman and Bracket Classes 

- Maximum Valve Lift .900

- O.D. 1.640

- I.D. .860 

- Installed / Open Pressure 280 @ 2.100 / 795 @ 1.250

- Rate (lbs/in.) 604

- Coil Bind 1.150

- Weight (grams) 160