Rocker Arm Stud Boss Cutter

Rocker Arm Stud Boss Cutters from Pit Stop USA include a universal arbor that also acts as a pilot/guide and fits into the original stud hole. When switching over your factory cylinder heads for screw-in studs, you need to machine down the stud boss equal to the thickness of the new stud's jam nut plus the guide plate thickness. Attach the boss cutter to an arbor press with the included adapter/guide, mount your cylinder head boss underneath the blade.