HEMI engines are generally associated with classic and modern muscle cars, but the technology actually dates back to the early years of the 20th Century, when a few manufacturers followed the lead of Belgian automaker Pipe in designing ‘hemi’ engines. The name comes from the hemispherical shape of the combustion chambers, which allows for a more efficient transfer of energy from the spark plug to the piston and the use of bigger intake and exhaust valves. Chrysler implemented the design
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