Camshaft - Thumper NSR Stage 1 - Hydraulic Roller - Lift 0.541 / 0.536 in - Duration 276 / 295 - 112 LSA - 1600 / 6400 RPM - GM LS-Series - Each Brand-COMP CAMS MPN 54-701-11 . **NOTE: Gen IV Engines Truck Freight NO
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