Dual valve springs with damper
O.D.: 1.550 inch, I.D.: 1.140 inch, Inner Spring I.D.: .738 inch
Seat pressure: 200 lbs. @ 1.900 inch,
Open Pressure: 580 lbs. @ 1.200 inch
Coil Bind: 1.100 inch = .700 inch lift
Max Lift: .700 inch max lift
Good for solid Roller cams. Used internally on all -3 Big Block Head Assemblies
Excellent success rate with these. Have used these springs on All World Products, Bill Mitchell Products and BMP cylinder heads for 20 plus years. As the old saying goes “if isn’t broken then don’t fix it”. Of course we recommend that you check your valve spring rates periodically to make sure they are in good health.