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The Cometic Chevrolet Gen-3 Inline 6 .040in MLS Cylinder Head Gasket - 4.125in Bore - C5699-040 is a precision-engineered head gasket with a 4.125" bore and .040" 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: Buick Apollo (1973–1975); Buick Skylark (1968–1971); Buick Special (1968–1969); Chevrolet Bel Air (1963–1973); Chevrolet Biscayne (1963–1972); Chevrolet Blazer (1969–1974); Chevrolet Brookwood (1969–1972); Chevrolet C10 (1963–1984); and 48 more.
Free U.S. standard shipping on qualifying orders $199+. Special order and made-to-order items can't be cancelled or refunded once ordered.
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