Eliminates main cap walk and fretting for improved engine block integrity
Hardened parallel ground washers protect threads and enhance durability
Precision J-form threads rolled after heat treatment for increased fatigue life
Forged 8740 chrome moly steel bolts with under-head radius for superior reliability
Available in high-performance series rated up to 200,000 psi for competition use
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ARP MainStud Kit for 2ZZ PRODUCT DETAILS *Main Studs* There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel-ground washers and high quality nuts. Some applications have provision