MLS head gaskets consist of two to five sheets of spring or carbon steel, which are sandwiched with the sealing material to form multi-layer steel head gaskets.

GASKET, a company which manufactures automobile accessories, was founded by Joseph F. Hrudka in 1965 to produce a new type of gasket he designed to withstand high temperatures. At the time, Hrudka and his brother Tom participated in the drag-racing circuit and hoped to make around $6,000 annually to fund their racing.

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 aluminium heads to aluminium blocks and aluminium heads to cast iron blocks. They can withstand the shearing force created by the two materials.

The basic premise of a MLS gasket is sandwiching three or more layers of thin steel that have been embossed in critical sealing areas. The embossments act as “springs” to ensure that there is no leakage of fluids or combustion pressure if the cylinder head moves or expands while the engine is under heavy load.

An MLS gasket is better at handling that difference in expansion rates than a typical composite gasket. In the event you get into pre-ignition or detonation, the more robust MLS gasket is also better at withstanding the tremendous spike in pressure those events create.

040″-. 044″ thickness and designed to fit a 4.125″ bore. The difference between an MLS and Cometic's MLX gasket, which stands for Multi-Layer-Xtreme, is an extra 'stopper' fold-over layer that provides a torque limiting surface and prevents yielding of the combustion seal.

On September 22, 2015, Holley acquired MSD Group, which includes brands MSD, Mr. Gasket, Lakewood, Accel, Mallory, Hays, and SuperChips.

There are essentially two types of gasket failure modes. Gasket blowout is the catastrophic failure of a gasket, resulting in the instantaneous and forceful leakage of media. The second failure mode is chronic leakage, where a gasket progressively deteriorates over time, causing small amounts of media to leak.

Modern MLS head gasket technology is lightyears better than old school paper and composite gaskets. However, proper installation and prep are key to making them bombproof!

MLS head gaskets go on dry because they are coated with a sealant. Each MLS head gasket is coated with a . 001" thick viton rubber that is bonded to the outer stainless steel layers. Adding an additional sealer can hinder the performance of an MLS head gasket.

It's not necessary. And it's not going to actually help the gasket do its job any better. Now while I don't necessarily recommend it I know that a lot of engine builders also reuse metal head gaskets.

An MLS gasket is better at handling that difference in expansion rates than a typical composite gasket. In the event you get into pre-ignition or detonation, the more robust MLS gasket is also better at withstanding the tremendous spike in pressure those events create.

Q: Can I reuse an MLS gasket? A: Here is our take on this. If the engine hasn't been run very long (less than a few hundred miles or less than a few hours) an MLS gasket can almost surely be re-used if you have to remove the head.

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Federal-Mogul Motorparts Fel-Pro is a brand of Federal-Mogul Motorparts, a global manufacturer of original equipment and replacement components for automotive, commercial vehicle, performance, agricultural, industrial and other applications.

Gasket Quality For instance a $2.00 compressed gasket may last 1 – 5 years, but a more expensive gasket, such as a $25.00 gasket could last 20 years.