Manufacturer's Part Number:
Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts
Summit Racing Part Number:
Hydraulic roller tappet
Basic Operating RPM Range:
Intake Duration at 050 inch Lift:
Exhaust Duration at 050 inch Lift:
Duration at 050 inch Lift:
218 int./228 exh.
Advertised Intake Duration:
Advertised Exhaust Duration:
279 int./287 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
Exhaust Valve Lift with Factory Rocker Arm Ratio:
Valve Lift with Factory Rocker Arm Ratio:
0.492 int./0.492 exh.
Lobe Separation (degrees):
Valve Springs Required:
For pre-1996 LT1 and L98 engines the dowel pin in the end of the camshaft must be pushed in so extension from end of cam is between 0.290 in. and 0.310 in. For 1996 LT1 and LT4 engines, the dowel pin is in the correct position extending 0.620 in. from the end of the camshaft. This cam has a fuel pump lobe. Valve lift shown is with factory 1.5 rocker arm ratio, the lift with a 1.6 ratio rocker arm is 0.525 in.
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These LT4 Hot Cams from Chevrolet Performance are direct replacements for your stock LT4 hydraulic roller cam. They are designed to increase horsepower and torque in your LT4.