Multi-layer steel gaskets, known as MLS gaskets, are made of 3 or more layers of spring steel, with the outer layers embossed in critical areas for improved sealing. The outer layers are also coated with viton, silicone, or other proprietary solutions for better sealing as well. This type of head gasket is used for high-performance applications that normal head gaskets can’t withstand. Although it may seem hard to believe, in a high performance engine the head actually lifts off the block hundreds if not thousands of time per minute. The outward tension provided by the steel layers help maintain a seal when this happens. MLS gaskets need to be installed on very smooth surfaces, 50RA or better, and go on dry. They should not be used with receiver rings.
MLS gaskets are currently available off-the-shelve from many suppliers, but they are not available for every car engine. As far as I am aware, Gaskets-to-Go is the only manfacturer able to custom manufacture MLS gaskets in quantities as low as one-off. Most suppliers require large (50+) orders or expensive upfront tooling charges. They are not cheap, but they are often the only solution. Please feel free to contact me via http://www.gasketstogo.com if you are interested in this type of gasket.
I will post an image of an Alfa Romeo Montreal, which I think you will agree is a fine looking automobile. This customer had completed some engine mods and wanted and MLS gasket.
We used his old gaskets to create the pair below.
If you own a Montreal and need some MLS gaskets please contact me via http://www.gasketstogo.com
Please visit www.gasketstogo.com
Scan of original Armstrong style metal sandwich exhaust gaskets
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