Eagle H beam connecting rods are a two piece forging. This forging process forces the grain into the shape of a connecting rod, resulting in a superior fatigue life. The rod cap is forged separately so that the grain runs perpendicular to the load forces, which strengthens the rod. Eagle H rods are forged from 4340 grade steel and although it is a more expensive process, all ESP Eagle rods also include a higher content of nickel and chrome, which increases the strength and fatigue life without making the connecting rod brittle.