Chrysler introduced the third-generation HEMI V8 engine in 2003, after the format had sat on the shelf since the early 1970s. The 21st century HEMI debuted with a displacement of 5.7 liters and has since been joined by 6.1, 6.2, and 6.4-liter cousins. Like their fathers and grandfathers, the newer HEMI engines take their name from the hemispherical (half-dome) shape of their combustion chambers.  This design allows the energy from the power stroke to be more efficiently transferred to
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