Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .030in MLS Cylinder Head Gasket - 4.630in Bore - C5434-030

The Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .030in MLS Cylinder Head Gasket - 4.630in Bore - C5434-030 is a precision-engineered head gasket with a 4.630" bore and .030" 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.

• Material: Multi-Layer Steel (MLS)
• Bore Size: 4.630"
• Thickness: .030" compressed
• Part Number: C5434-030

Verified fitment: Chevrolet Bel Air (1965–1975); Chevrolet Biscayne (1965–1972); Chevrolet Blazer (1973–1974); Chevrolet Brookwood (1969–1972); Chevrolet C10 (1968–1980); Chevrolet C10 Suburban (1968–1980); Chevrolet C20 (1968–1986); Chevrolet C20 Suburban (1968–1986); and 47 more.