COMP Cams 26918-16 Beehive 1.075"/1.310" O.D. Valve Spring, (Set of 16) Seat pressure: 125 pounds at 1.800 inches, Open pressure: 367 pounds at 1.150 inches O.D : 1.075 inches (Top) 1.310 inches (Bottom), I.D : 0.650 inches (Top) 0.885 inches (Bottom) Designed for hydraulic roller cams 0.625 inches maximum lift, 1.310 inches O.D. Originally designed for LS engine applications but will work in 5.7L Hemi engines and many others