RTS/ARP 7/16UNF Flywheel Bolt Kit, 1.00"UHL, Suits Ford Windsor,Cleveland, B/Block, Small Block, Big Block Chevrolet, SetRTS has teamed up with ARP to supply customers High Performance Series flywheel bolts far superior to OEM hardware. They're forged from aerospace alloy and heat treated prior to thread rolling and machining. They feature an exclusive, flat, 12 point head design and a larger than stock shank diameter, for increased strength and improved register. Suits Ford Windsor, Cleveland,FE 390 427, 429 460 Chevrolet all Small Block, Big Block with 2 Piece Seal