This great little tool actually slides down into the lifter bore and rides on top of the camshaft in order to measure lobe lift and base circle runout. It comes complete with two followers, one for flat tappet or hydraulic
cams and one for rollers. The tool has both GM (.842" dia.) & Ford (.875" dia.) diameters. The best design feature of this tool is the built in O-ring on each end that holds the tool securely in the lifter bore.
Just slide in any standard dial indicator (not included), and you're ready to go.
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