While the 6.2 HEMI has made a name for itself under the hood of multiple high-performance Chrysler vehicles ... that convert the 5.7 HEMI's cylinder head intake mounting holes to accept a 6.2 ...
The top-tier gets quite serious, adding CNC-ported cylinder heads ... power for the 5.7-liter HEMI V-8 engine, with up to a 58 horsepower gain with the Stage 3 kit --performance upgrade levels ...
the 6.1-liter HEMI V8 engine also received several other upgrades that enabled it to make more power than the 5.7-liter variant. These include high-flow cylinder heads, strengthened cylinder block ...