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Basic Operating RPM Range
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Duration at 050 inch Lift
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Advertised Duration
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Valve Lift with Factory Rocker Arm Ratio
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Grind Number
- CB XM 308HR-12 (1)
- CS XM 270HR-12 (1)
Engine VIN Code
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- Made In USA (2)

COMP Cams Xtreme Marine Camshafts

4.89 out of 5 stars 19 Customer Reviews

COMP Cams Xtreme Marine camshafts take advantage of the newest developments in camshaft engineering. Their aggressive lobe design produces better throttle response and top-end horsepower than other cams with the same duration at .050 in., while delivering increased engine vacuum. These cams are available for everything from pleasure boats to race applications, so you can always enjoy Xtreme performance on the water. From hydraulic and mechanical, to flat and roller tappet, COMP Cams offers camshafts for your watercraft dating as far back as the 1950s.