ARP MAIN STUD KIT TO SUIT HOLDEN CAPRICE VS WH WK ECOTEC L36 L67 SUPERCHARGED 3.8L V6There 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. The studs are manufactured using the best materials, processes, designs and engineering. Every ARP main stud kit exceeds the most stringent aerospace specifications. All kits come complete with parallel ground washers and aerospace quality nuts. The studs are manufactured from 8740