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Pros and cons of the Hemi engine

The Hemispherical combustion chamber brings big power, but is that all there is to the iconic Hemi engine?
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HEMI Owners Are Deleting This Feature, Even Though It's Costing Them Fuel

Since 2005, the Gen III HEMI engine (which, fun fact, aren't actually hemis) has sported a feature called MDS, standing for Multi Displacement System, the first of its kind in its respective vehicle ...