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Roller cams use a lifter with a small, very hard wheel on roller bearings that follows the shape of the lobe. Roller cams are more expensive than flat-tappet cams but offer more lift for the same number of degrees of duration.
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Roller cams use a lifter with a small, very hard wheel on roller bearings that follows the shape of the lobe. Roller cams are more expensive than flat-tappet cams but offer more lift for the same number of degrees of duration.  View Related Article

 

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