... for high performance engine. Our rod forging is made of air space high-quality 40CrNiMoA Alloy Steel(American SAE 4340) for all high performance racing rods. The rod ... and Janpanese cars, like Honda, Chevy,Ford,Nissan, VW, BMW etc.2. Precision Control Accuracy of the connecting rod:A. Big End Tolerance ... +/-1g and its total weight is not more than +/-1g. I-Beam Connecting Rods