SKU: SKU: CGSPRO1005T-4300-040
The Cometic Chevy Mark-IV Big Block V8 Top End Gasket Kit-4.300in Bore-.040in MLS Cylinder Head Gasket - PRO1005T-4300-040 is a precision-engineered head gasket with a 4.300" bore and .300" 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 (1970–1980); Chevrolet C10 Suburban (1970–1980); Chevrolet C20 (1970–1985); Chevrolet C20 Suburban (1970–1985); and 40 more.