Topplocksbult från ARP High Performance serien i 6-kant utförande.
20st (7/16"-14) med härdade planbrickor.
Standard topplock 289/302, Edelbrock 60259/60379 eller motsvarande topplock.
För 351W topplock på 289/302 använd "insert washers" 7/16" som ARP 200-8573/ eller 200/8598 eller motsvarande.

Mer information i ARP´s katalog kan du läsa här.

HIGH PERFORMANCE SERIES.
High Performance head bolts are available with a reduced wrenching hex or 12-point and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head retorquing.
All High Performance Series bolts are 180,000 psi (which is 15% stronger than Grade 8) and kits come complete with hardened parallel-ground washers.