Working with the crank to get us the right stroke are these 6.125-inch Lunati H-beam rods (part #6125H). The rods are forged from the same aircraft-grade 4340 steel as the crank. Then they are heat treated, stress relieved, shot peened, and magnafluxed to ensure they will last. After all, connecting rods are subjected to some of the highest stress levels of any bottom-end engine component. When the piston direction reverses from top dead center, the forces on the rod can exceed 12,000 pounds. To hold up to the punishment the rods also utilize ARP cap hardware.