Cometic BB 4.630in Bore .066 inch MLS-5 396/402/427/454 Head Gasket - C5331-066

The Cometic BB 4.630in Bore .066 inch MLS-5 396/402/427/454 Head Gasket - C5331-066 is a precision-engineered head gasket with a 4.630" bore and .630" compressed thickness.

The Cometic 5-Layer Multi-Layer Steel (MLS) head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Featuring 5-Layer Multi-Layer Steel (MLS) construction, this gasket uses five embossed steel layers delivering exceptional clamping load distribution for high-output applications. 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: 5-Layer Multi-Layer Steel (MLS)
• Bore Size: 4.630"
• Thickness: .630" compressed
• Part Number: C5331-066

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.