Manley rotating assembly for BBC 572 with a 4.250" stroke is a complete, matched system built to deliver strength, balance and reliable operation at high RPM and cylinder pressures. It pairs precision-forged crankshafts with high-strength connecting rods and premium pistons to reduce friction and handle heavy loads. Included are 4340 H-beam rods with 7/16 ARP 8740 (optional ARP 2000), 2618 forged pistons and a 4340 forged crank; supports roughly 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