Brand: Isky Racing Cams Manufacturer’s Part Number: 4905 Part Type: Valve Springs Valve Spring Style: Standard Number of Springs Per Valve: Dual Retainers Included: No Outside Diameter of Outer Spring (in.): 1.290 in. Coil Bind Height (in.) 1.065 in. Damper Spring Included: Yes Spring Rate (lbs/in.): 360 lbs./in. Inside Diameter of Outer Spring (in.): .940 in. Inside Diameter of Inner Spring (in.): .690 in. Locks Included: No Valve Stem Seals Included: No Valve Springs Coated: No Remanufactured: No Quantity: Sold as a set of 16. Installed Height (in.): 1.800 in. Seat Pressure at Installed Height (lbs.): 125 lbs. Open Height (in.)(application): 1.150 Open Pressure (lbs.): 360 lbs.