Cylin­der-Head Bolts

Muscle Car Review - - New Products -

The folks at Earl’s Per­for­mance Plumb­ing have given some thought to the de­sign of the cylin­der-head bolts they make for big-block Chevys (shown here) and small-block Fords. They are fash­ioned from 170,000-psi chro­moly al­loy steel, which is about 15 per­cent stronger than Grade 8 bolts, says the com­pany. The bolt heads (avail­able in both 12-point and hex-head con­fig­u­ra­tions) are smaller than usual for ex­tra socket clear­ance around the rocker arms. Plus, an ex­traw­ide flange pro­vides ad­di­tional sup­port for the ex­tra-thick chro­moly wash­ers in­cluded in the set. In­for­ma­tion: Earl’s Per­for­mance Plumb­ing di­vi­sion of Hol­ley, hol­

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