The Cometic Street Pro GM 1968-76 455ci OLDS Big Block 4.200 Top End Gasket Kit - PRO1009T is a precision-engineered gasket kit designed for a 4.200" bore.
This Cometic complete gasket kit delivers a comprehensive, precision-matched set of seals and gaskets engineered to OE or better specifications. Each component is manufactured from materials specifically chosen for their temperature range, chemical resistance, and compressibility — ensuring every sealing surface in your engine is properly protected during rebuild or performance upgrades.
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Material: Multi-Layer Steel (MLS)
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Bore Size: 4.200"
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Part Number: PRO1009T
Verified fitment: Buick Electra (1975–1976); Buick Estate Wagon (1975–1976); Buick LeSabre (1975–1976); Buick Riviera (1975–1976); Oldsmobile 442 (1968–1971); Oldsmobile 88 (1968–1976); Oldsmobile 98 (1968–1976); Oldsmobile Custom Cruiser (1971–1976); and 7 more.