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The Cometic Chevrolet 348/409 W-Series Big Block V8 .027in MLS Cylinder Head Gasket - 4.375in Bore - C5256-027 is a precision-engineered head gasket with a 4.375" bore and .027" 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 (1958–1965); Chevrolet Biscayne (1958–1965); Chevrolet Brookwood (1958–1961); Chevrolet C10 (1960–1961); Chevrolet C20 (1960–1961); Chevrolet C30 (1960–1961); Chevrolet Del Ray (1958); Chevrolet El Camino (1959–1960); and 10 more.
Free Canadian shipping on qualifying orders $399+, with no duties or brokerage. Special order and made-to-order items can't be cancelled or refunded once ordered. Oversized items may carry a handling fee depending on your location; pickup in Mississauga has no fee.
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