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ARP main stud kits are engineered to provide unparalleled strength and reliability for your engine. Made from premium 8740 chromoly steel, these studs feature a remarkable 190,000 psi tensile strength. Precision centerless-ground and thread-rolled to Mil-S-8879 specifications, the studs are treated with a black oxide finish to resist corrosion, ensuring long-lasting durability. Each kit comes complete with hardened parallel-ground washers and high-strength hex nuts, as well as provisions for a windage tray and serrated locking nuts.
These main studs are designed to eliminate issues like main cap walk and fretting, while also protecting the threads in your engine block. Manufactured in-house with exacting standards, ARP main studs boast precision J-form threads that are rolled after heat treatment, delivering a 2000% increase in thread strength compared to other fasteners. Perfect for both OEM LS engine blocks and most aftermarket blocks, ARP main stud kits offer the reliability and performance trusted by professional engine builders.
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