Bolt-On Hydraulic Roller Power The basic advantage of a hydraulic roller camshaft is that roller followers allow the cam designer to be more aggressive in creating additional valve lift.

The hydraulic roller has taken over as the most common OEM cam configuration, using an internal adjustment mechanism and a roller follower. It shares the hydraulic flat's characteristics of quiet ...

Early (pre-'87) small-blocks require a retrofit-style hydraulic-roller cam and valvetrain while most '87-and-later small-blocks can use much, if not all, of the original roller-cam valvetrain.

The cam follower pivoted on a ball mounted on a hydraulic mechanism like those in hydraulic lifters. That eliminated valve adjustments, satisfying Pontiac brass. The Cammer was only produced for ...