Manley rotating assembly for BBC 572 with a 4.250" stroke is supplied as a complete, matched package engineered for demanding engine use. Precision-forged crankshafts, high-strength connecting rods and premium pistons are selected and balanced to reduce friction and handle high RPM and cylinder pressures. The kit includes 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 notes Ford 4.6L application.
Manley Rotating Assembly, BBC 572 4.250 STROKE/4.625/-3cc