The Cometic Chevy Mark-IV Big Block V8 Top End Gasket Kit-4.560in Bore-.040in MLS Cylinder Head Gasket - PRO1005T-4560-040 is a precision-engineered head gasket with a 4.560" bore and .560" 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.
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Material: Multi-Layer Steel (MLS)
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Bore Size: 4.560"
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Thickness: .560" compressed
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Part Number: PRO1005T-4560-040
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.