All ESP Rods are manufactured from a TWO-PIECE FORGING. The 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.
Many aftermarket rods are manufactured from 4340 steel. 4340 specs allow a range of different materials to achieve the desired results. Although it is a more expensive process, all ESP 3-D rods also include higher content of nickel & chrome, which increases the strength and fatigue life without making the rod brittle. Extensive testing has proven Eagle's two-piece forging superior to any one-piece forging on the market!
Forged 4340 Steel Crankshafts
ESP 4340 steel cranks feature exceptional strength and unsurpassed quality at a reasonable price. It's the perfect choice for demanding applications. Eagle's 4340 cranks are comparably priced with competitor's cranks of lesser strength.
