Single valve springs with damper
O.D.: 1.250 inch, I.D.: .880 inch
Seat pressure: 135 lbs. @ 1.750 inch,
Open Pressure: 360 lbs. @ 1.200 inch
Coil Bind: 1.160 inch, .550 inch lift
Max recommended lift: .500 inch Max Lift
Good for Hydraulic Flat tappet cams. Used internally on all -1 Small Block Head Assemblies
Have been using these springs for 20 plus years. Excellent success rate with these. Have used these springs on All World Products and Bill Mitchell Products 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.