Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .045in MLS Cylinder Head Gasket - 4.350in Bore - LHS - C5765-045

Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.045". Left Side. Cometic MLS (Multi-Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two materials. MLS gaskets have increased strength because they are comprised of multiple layers of stainless steel; which also creates the ability to rebound and resist corrosion. The outer layers are embossed and coated on both sides with Viton (a flour elastomer rubber based material that is heat resistant to 250 C/ 482 F). Viton is designed to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes. The center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements.

This Part Fits:

Year	Make	Model	Submodel
2002-2004	Chevrolet	Avalanche 2500	Base
2005-2006	Chevrolet	Avalanche 2500	LS
2005-2006	Chevrolet	Avalanche 2500	LT
2001-2002	Chevrolet	Express 3500	Base
2001-2002	Chevrolet	Express 3500	LS
2001-2005	Chevrolet	Silverado 2500 HD	Base
2001-2006	Chevrolet	Silverado 2500 HD	LS
2001-2006	Chevrolet	Silverado 2500 HD	LT
2004-2006	Chevrolet	Silverado 2500 HD	WT
2007	Chevrolet	Silverado 2500 HD Classic	LS
2007	Chevrolet	Silverado 2500 HD Classic	LT
2007	Chevrolet	Silverado 2500 HD Classic	WT
2001-2006	Chevrolet	Silverado 3500	LS
2001-2006	Chevrolet	Silverado 3500	LT
2004,2006	Chevrolet	Silverado 3500	WT
2007	Chevrolet	Silverado 3500 Classic	LS
2007	Chevrolet	Silverado 3500 Classic	LT
2007	Chevrolet	Silverado 3500 Classic	WT
2001	Chevrolet	Suburban 2500	Base
2001-2006	Chevrolet	Suburban 2500	LS
2001-2006	Chevrolet	Suburban 2500	LT
2001-2002	GMC	Savana 3500	Base
2001-2002	GMC	Savana 3500	SLT
2002-2005	GMC	Sierra 2500 HD	Base
2001-2002,2006	GMC	Sierra 2500 HD	SL
2001-2006	GMC	Sierra 2500 HD	SLE
2001-2006	GMC	Sierra 2500 HD	SLT
2003-2006	GMC	Sierra 2500 HD	WT
2007	GMC	Sierra 2500 HD Classic	SL
2007	GMC	Sierra 2500 HD Classic	SLE
2007	GMC	Sierra 2500 HD Classic	SLT
2007	GMC	Sierra 2500 HD Classic	WT
2002-2005	GMC	Sierra 3500	Base
2001-2002,2006	GMC	Sierra 3500	SL
2001-2006	GMC	Sierra 3500	SLE
2001-2006	GMC	Sierra 3500	SLT
2004-2006	GMC	Sierra 3500	WT
2007	GMC	Sierra 3500 Classic	SL
2007	GMC	Sierra 3500 Classic	SLE
2007	GMC	Sierra 3500 Classic	SLT
2007	GMC	Sierra 3500 Classic	WT
2001-2006	GMC	Yukon XL 2500	SLE
2001-2006	GMC	Yukon XL 2500	SLT

Please note image may vary from product. Also, some items are special order. If delivery time is a concern, please contact us prior to purchase. 

If you need a Gasket Cometic likely makes the best version of it you can buy. Being the go to name in gaskets, you can be sure you get quality and perfect fit every time!

Cometic Gasket offers a wide range of high-performance sealing solutions, with their head gaskets being one of their most popular products. Designed for both street and racing vehicles, these gaskets come in materials like multi-layer steel (MLS), copper, and composite, providing a reliable seal even under extreme pressure and heat. Whether for everyday driving or high-performance racing, Cometic head gaskets are built to ensure durability and performance in the most demanding conditions.

The company also manufactures engine gaskets for key components such as valve covers, oil pans, intake manifolds, and exhaust systems. These gaskets are engineered to handle high temperatures and pressures, preventing leaks and ensuring optimal engine performance. Cometic Gasket’s expertise extends to creating custom gaskets for unique or modified engines, allowing professionals and enthusiasts to get tailored solutions for specialized applications.

Cometic Gasket is deeply involved in motorsports, providing high-performance gaskets used in racing engines across disciplines like NASCAR, drag racing, and Formula 1. Their products are trusted by racing teams and engine builders who require top-notch sealing solutions under extreme conditions. In addition, Cometic’s use of advanced materials like MLS ensures that their gaskets offer superior strength, flexibility, and heat resistance, making them ideal for high-performance engines.

Serving the motorsports, automotive, and industrial sectors, Cometic Gasket has built a reputation for innovation and customization. Whether for performance vehicles, race teams, or industrial machinery, they continue to develop cutting-edge gasket solutions that meet the highest standards of quality and reliability.

About Fidanza Performance-

​Fidanza Performance, founded in 1997, is a leading US manufacturer of high-quality lightweight aluminum flywheels, precision adjustable cam gears, and high-performance clutches. With nearly 20 years in the automotive performance market, Fidanza is renowned for its expertise and respected globally, offering products for a wide range of vehicles, from European sports cars to modern muscle cars and imports. The company originated in racing, with founder Lou Fidanza's success in the SCCA leading to the creation of specialty parts like aluminum flywheels. Fidanza has since expanded its product line to include cam gears and performance clutches, gaining a loyal customer base and worldwide recognition. In 2023 Fidanza opened the Fidanza Marketplace which sells other manufacturers quality high performance parts!