Manley rotating assembly for BBC 565 with a 4.250" stroke is a matched package engineered to meet high-demand engine requirements. Precision-forged crankshafts, high-strength connecting rods and premium pistons are balanced and selected to reduce friction and withstand extreme RPM and cylinder pressures. The assembly includes 4340 forged 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 fitment.
Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/-3cc