Cometic GM LSX Gen-4 small block V8 cylinder head gasket is specified with a .063" David S. Taylor (DST) thickness, 4.165" bore, and provisions for both 1/2" and 3/8" studs, left-hand side. This head gasket is intended for Gen-4 LSX small block assemblies requiring the listed bore and stud configuration in the left-hand cylinder head position.
Cometic Gasket GM LSX Gen-4 SB V8 .063in DST Cyl. HG - 4.165in Bore - 1/2in & 3/8in Studs - LHS