Cometic Ford 221 Flathead V8 .040in MLS Cylinder Head Gasket - 3.156in Bore - 21 Stud - C5870-040

Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.040". 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
1937-1940,1942-1947	Ford	1 Ton Pickup	Base
1937-1940,1942-1947	Ford	1/2 Ton Pickup	Base
1937-1940,1942-1947	Ford	3/4 Ton Pickup	Base
1953	Ford	Club	Base
1950-1953	Ford	Country Sedan	Base
1950-1953	Ford	Country Squire	Base
1952-1953	Ford	Courier Sedan Delivery	Base
1950-1953	Ford	Crestline	Base
1949-1952	Ford	Custom	Base
1952-1953	Ford	Customline	Base
1940,1946-1951	Ford	Deluxe	Base
1948-1952	Ford	F-1	Base
1953	Ford	F-100	Base
1948-1952	Ford	F-2	Base
1953	Ford	F-250	Base
1948-1952	Ford	F-3	Base
1953	Ford	F-350	Base
1948-1952	Ford	F4	Base
1949	Ford	Ford	Base
1952-1953	Ford	Mainline	Base
1942	Ford	Model 21 A Deluxe	Base
1935	Ford	Model 48	Base
1935	Ford	Model 48	Deluxe
1935	Ford	Model 48	Standard
1936	Ford	Model 68	Base
1937	Ford	Model 74	Base
1938	Ford	Model 82 A	Base
1950-1953	Ford	Ranch Wagon	Base
1937-1940,1942,1946-1947	Ford	Sedan Delivery	Base
1939-1940	Ford	Standard	Base
1952-1953	Ford	Sunliner	Base
1942,1946-1948	Ford	Super Deluxe	Base
1951-1953	Ford	Victoria	Base
1952-1953	Mercury	Custom	Base
1946-1952	Mercury	Mercury	Base
1950-1953	Mercury	Monterey	Base
1941	Mercury	Series 19A	Base
1942	Mercury	Series 29A	Base
1939	Mercury	Series 99A	Base
1940	Mercury	Series O9A	Base

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!