ARP Main Stud Kit | Chrysler 2.2L 4cyl M11 (141-5401)Chrysler 2. 2L 4cyl M11 Main Stud Kit by ARP 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. These studs are manufactured in our own factory using the best materials, processes, designs and engineering. Every ARP main stud kit exceeds the most stringent aerospace specifications. All kits come complete with hardened parallel