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The Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .080in MLS Cylinder Head Gasket - 4.350in Bore - LHS - C5765-080 is a precision-engineered head gasket with a 4.350" bore and .080" compressed thickness for the Left-Hand Side (LHS).
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 Avalanche 2500 (2002–2006); Chevrolet Express 3500 (2001–2002); Chevrolet Silverado 2500 (2001–2007); Chevrolet Silverado 3500 (2001–2007); Chevrolet Suburban 2500 (2001–2006); GMC Savana 3500 (2001–2002); GMC Sierra 2500 (2001–2007); GMC Sierra 3500 (2001–2007); and 1 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