The ARP head stud kit for small-block Chevy with 18A rollover Brodix heads and a 12-point pattern is specified to match that head style and secure the head to the block. It’s intended for engine builds and repairs where reliable clamping and consistent head retention are necessary to preserve gasket sealing under repeated thermal and mechanical stresses.
ARP SB Chevy w/18A Rollover Brodix 12pt head stud kit