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The COMP Cams XM 278H hydraulic flat tappet cam fits Chevy small-blocks (262–400 ci) from 1958–2002 and is intended for high-performance marine and offshore use. Suited to jet-boat setups with A or B impellers, it delivers aggressive top-end power and torque while trading off idle smoothness. Install with compatible valvetrain components and supporting induction and exhaust systems when prioritizing peak marine performance over idle refinement.
COMP Cams Camshaft CS XM 278H-12
