Manley rotating assembly for BBC 572 (4.250" stroke) is supplied as a matched rotating package designed to deliver balance and durability for high-output engines. It pairs precision-forged crankshafts with high-strength connecting rods and premium pistons to improve load handling, reduce friction and sustain extreme RPM and cylinder pressures. Kit contents include 4340 H-beam rods with 7/16 ARP 8740 (optional ARP 2000), 2618 forged pistons and a 4340 forged crank; supports about 900 hp with ARP 8740 or up to 1,500 hp with ARP 2000 and cites Ford 4.6L fitment.
Manley Rotating Assembly, BBC 572 4.250 STROKE/4.625/-3cc