Nitto I-Beam Connecting RodsThe whole Nitto 4340 connecting rod range is produced from the highest quality double melted forged billet material. Double melted 4340 is a significant feature when compared to other aftermarket offerings which are typically only single melted. The extra melting process removes material impurities, ensuring the 4340 material our rods are made from are of the highest standard. The forging of the billet also ensures a tight and uniform relationship