The ARP 134-0901 kit is designed to securely fasten the bellhousing to the engine block on Chevy LS Series engines. Made from 8740 chromoly steel, these bolts are heat-treated and finished in black oxide for corrosion resistance and long-term durability. With a tensile strength of 170,000 psi, they’re significantly stronger than standard Grade 8 hardware—ideal for high-performance builds.