Seat pressure: 93 lbs. @ 1.570 inch, Open Pressure: 198 lbs. @ 1.020 inch;O.D.: .959 inch (Top) 1.061 inch (Bottom), I.D.: .636 inch (Top) .738 inch (Bottom);Designed for Ford 4.6L and 5.4L Modular 3 Valve engines;.550 inch maximum lift, 1.061 inch O.D.;No machining required

• Competition Cams 26113-24 Beehive Valve Springs for Ford 4.6L and 5.4L Modular 3 Valve Engines

Competition Cams 26113-24 Beehive Valve Springs for Ford 4.6L and 5.4L Modular 3 Valve EnginesCOMP Cams