Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
ARP 12-point undercut head stud kit for small-block Chevy 18A heads with 3/8in holes. This kit is matched to 18A head patterns that use 3/8in holes and supplies a 12-point undercut stud solution for refastening those cylinder heads. It replaces factory fasteners with studs tailored to the 18A 3/8in pattern to ensure proper fit and clamping during assembly.
ARP SB Chevy 18A, 3/8in holes 12pt undercut head stud kit
