The JE Pro Seal head gasket for GM LSX 376 (left bank) is supplied with a 4.125 in bore and 0.051 in thickness as a bank-specific replacement. This Pro Seal gasket is intended for LSX 376 rebuilds or head work where left-bank distinction and precise bore and compressed thickness are required. Reference C5934-051 to identify the correct left-side gasket during service.
JE Pro Seal GM LSX 376 - Left 4.125in 0.051in Headgasket (ref C5934-051)