Strange nodular cases are machined from SAE D-4512 nodular iron which is 8% stronger than the nodular material that is found in OEM cases. The 8% material strength is only a small portion of the total strength increase that a Strange case offers. The chrome-moly bearing caps are retained by socket head cap screws that exceed grade 8 specifications. Offer enhancements include steel adjuster nuts, reinforced pilot bearing area and carefully designed ribbing that increase rigidity. Strange nodular iron cases are virtually indestructible and are recommended any vehicle that accepts a 9” housing and gear.