Details
ARP 2543708 Pro Series 12-Point Cylinder Head Bolt Kit

Professional Series cylinder head bolts are premium fasteners for competition components
Rated nominally at 200,000 psi, which is substantially stronger than Grade 8 hardware
Wide area flanged head eliminates the need for valve train removal to facilitate cylinder head retorquing
Features reduced wrenching 12-point style heads
Comes complete with hardened parallel-ground washers
Pro Series bolts are cold-forge to ensure molecular integrity, heat-treated prior to thread rolling and machining, and are rated nominally at 200,000 psi. ARP Pro Series head bolt kits are application specific -- designed for use with typically competition only components. These fasteners deliver superior strength and meet the ARP "zero defect -- zero failure" quality standard. Hardened and parallel-ground washers are included with each kit to ensure even load distribution and accurate torque readings. They feature reduced wrenching 12-point heads and wide area flanges to eliminate the need for valve train removal for cylinder head retorquing and permits the use of larger diameter valve springs. This kit is for select Ford small block applications (302 with Windsor heads 1/2" - 7/16" stepped bolt, 1/2" - 7/16").