COMP Cams Cutter For Stud BossWhen using screw in Studs on a factory cylinder head it is necessary to machine down the Stud boss equal to the thickness of the new Stud's jam nut plus the guide plate thickness. The Stud Boss Cutter from COMP Cams comes with a universal arbor that also acts as a pilot guide and fits into the original Stud hole. Catalog User 1
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