Len Emanuelson, Author at Import Car
MLS Gasket Update: Touting Their Advantages

The days of getting away with composition gaskets in extreme combustion situations were back when the deck surfaces on blocks and heads were thick and strong, and the heads were clamped with 5-6 head bolts per cylinder. However, all that changed when carmakers became extremely weight conscious for MPG reasons and they started removing material out of blocks and heads.