Here the info I got about the springs and retainer from my heads
maximum Valve Lift (in): 0.600 in.
Outside Diameter of Outer Spring (in): 1.460 in.
Damper Spring Included: Yes
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Chromoly steel
Locks Included: Yes
Lock Style: 7 degree
Asking 100 obo


