Ideal for use in the hemi engines, but are also great for use in Honda/Clone or Predator Non Hemi heads. Can be used with stock valves and retainers. Best suited for CL-1, CL-2, CL-3, Cl-4, Mod2 and CM265 grind cams when using stock 1:1 rockers. If using ratio rockers these springs may need to be shimmed or may not be strong enough depending on application. 

If you are using stainless valves you will need to use our heavy duty retainers, part number DJ-1047 or DJ-1047t.