Crane Cams 103091 Valve Spring 1994-99 Chevy 350 LT1... With Iron Cylinder... Set of 16 Valve Spring Spec Sheet: Outside Diameter1.255Inside Diameter0.870DamperNoSeat Press124 lbs @1.750Open Press374 @ 1.150Coil Bind.1.100Rate (lbs/in.)409 lbs/in.Max Net Lift0.640Installed...