Valve - Overhaul Kits New Case 159” 4 Cyl Gas 530, 540, 570 Includes (4) Exhaust Valves - 1.27” Head Diameter 5.36” OAL; (4) Intake Valves - 1.42” Head Diameter 5.29” OAL; (4) Exhaust Guides - .343” ID, 2.69” OAL; (4) Intake Guides - .343” ID, 2.44” OAL; (4) Exhaust Springs - 2.188” Free Length; (4) Intake Springs - 2.375” Free Length; (16) Keepers (Valve Locks) - 1 Groove. Heat Treated.