ARP 660-1014 Metric Thread Bolt Kit M6 x 1.00 x 90 hex black oxide bolts ymm_41 All Pro Series head bolts

All Pro Series head bolts have a reduced wrenching hex or 12-point head and wide area flange to eliminate the need for valve train removal for cylinder head retorquing and permits the use of larger diameter valve springs

Sierra 1500 2007-2013

Specifications Socket Size(s) 8mm 12pt UHL (Qty: 2) 20mm Thread Size M8 washers included

They’re application-specific

ARP 660-1014 Metric Thread Bolt Kit M6 x 1.00 x 90 hex black oxide bolts ymm_41 All Pro Series head boltsSpecifications Socket Size(s) 8mm hex UHL 90mm Thread Length 18mm Grip Length 72mm Thread Diameter Spacing M6 1. 00mm Grip Diameter 6mm Wrenching 8mm Head Height 6. 5mm Collar Diameter 11. 6mm