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The JE Pro Seal head gasket for GM LSX 454 (left bank) is offered with a 4.20 in bore and 0.051 in thickness as a left-side replacement option. This Pro Seal gasket is sized to match LSX 454 left-bank head and block combinations during rebuilds and head servicing where exact bore and compressed thickness are required. Reference C5936-051 to confirm the correct left-side gasket.
JE Pro Seal GM LSX 454 - Left 4.2in 0.051in Headgasket (ref C5936-051)
