Cometic GM LSX Gen-4 small block V8 cylinder head gasket with .063" DST thickness and a 4.200" bore is specified for the left-hand side and supports 1/2" and 3/8" stud configurations. This gasket is intended for Gen-4 LSX small block applications that require the larger 4.200" bore and the listed stud accommodation on the left head.
Cometic Gasket GM LSX Gen-4 SB V8 .063in DST Cyl. HG - 4.200in Bore - 1/2in & 3/8in Studs - LHS