.

These springs were purposely designed for those requiring a reliable spring for endurance racing applications, such as circle track or road racing. But they are also great for short track or drag race applications for racers wishing a longer lasting more reliable spring. Manufactured from race proven high endurance Alpha 1 material.

All are cycle-tested at maximum valve lift to insure peak performance. Part number S608 and S623 also features an electro-polished outer spring for enhanced fatigue resistance.

OD:1.550
ID:.735
Roller Spring
Max Lift: .720
Spring Type: Dual W/Damper
Seat Pressure: 240/2.000
Open Pressure: 590/1.280
Coil Bind: 1.190