The Manley rotating assembly for Ford 4.6L applications is a complete, matched crank/rod/piston package engineered for high-demand engines. It pairs a forged 4340 crank with 4340 H‑beam rods using 7/16 ARP 8740 bolts (optional ARP 2000 upgrade) and 2618 forged aluminum pistons. Assemblies are balanced and tolerance-controlled; rated to roughly 900 hp with ARP 8740 hardware or up to 1,500 hp with ARP 2000 fasteners.
Manley Chevrolet Big Block Rotating Assembly BBC 555 CID 4.250in Stroke 4.560in Bore -3cc