Manufacturer's Part Number:
Summit Racing Part Number:
Mechanical flat tappet
Basic Operating RPM Range:
Intake Duration at 050 inch Lift:
Exhaust Duration at 050 inch Lift:
Duration at 050 inch Lift:
257 int./269 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
Exhaust Valve Lift with Factory Rocker Arm Ratio:
Valve Lift with Factory Rocker Arm Ratio:
0.493 int./0.512 exh.
Lobe Separation (degrees):
Intake Valve Lash:
Exhaust Valve Lash:
Valve Springs Required:
Meets memorandum 1-A for original applications.
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