Unfortunately ARP Mainstud Kits for the H&F Series have been on Nationwide backorder since May of 2021 with no foreseeable ETA. We recommend the following options as substitutes...
inlinePRO H22 Main Stud Kit
ARP Main Studs will support well in excess of 1,000 horsepower and can be torqued more than once. Because a stud acts differently, you must “Align-Hone” (AKA Line Hone) your block before assembly. Contact your machine shop about “line honing” your block.
We recommend not reusing stock main bolts.