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The Cometic Chevy Mark-IV Big Block V8 Top End Gasket Kit-4.630in Bore-.045in MLS Cylinder Head Gasket - PRO1005T-4630-045 is a precision-engineered head gasket with a 4.630" bore and .630" compressed thickness.
The Cometic Multi-Layer Steel (MLS) head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Featuring Multi-Layer Steel (MLS) construction, this gasket uses multiple embossed steel layers that conform to surface irregularities and maintain a positive seal. Precision CNC-machined to exacting tolerances, this gasket seals combustion, water jackets, and oil passages simultaneously — eliminating the need for multiple gaskets or sealing compounds.
Verified fitment: Chevrolet Bel Air (1970–1975); Chevrolet Biscayne (1970–1972); Chevrolet Blazer (1973–1974); Chevrolet Brookwood (1970–1972); Chevrolet C10 (1973–1980); Chevrolet C10 Suburban (1973–1980); Chevrolet C20 (1973–1985); Chevrolet C20 Suburban (1973–1985); and 39 more.
Free U.S. standard shipping on qualifying orders $199+. Special order and made-to-order items can't be cancelled or refunded once ordered.
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We carry 750,000+ parts, so we can probably still get it. Check the spelling, try the part number, or ask us.
Request this part Text us (833) 691-5717