Manley Performance Spring-1.640 Double

• Unequalled performance
• All springs are triple except 221424 & 221425 double w/o damper
• Manley eclipses the 1000 lb. barrier
• Better valve train stability and component life
• Ideally suited for Fuel and Alcohol classes, Pro Stock, Competition, Super Stock, Super Gas and Mountain Motor applications

Specifications

Maximum Valve Lift : .900"

Outside Diameter : 1.640"

Inside Diameter : .860"

Installed / Open Pressure : 280 @ 2.100 & 794 @ 1.250

Rate : 604

Coil Bind : 1.150