40 pound dual spring sold as each

• 30 lbs. of pressure at .950" installed height
• 40 lbs. of pressure at 0.870" installed height
• 58 lbs. of pressure at .750" (for reference only, do not install that low)
• Coil bind at .505"
• Free height 1.200"
• Inner spring .480" ID, .625" OD
• Outer spring .690" ID, .880" OD

These will work with dukar 212, ghost, non hemi predator steel valve retainers