13. 6.2-Liter Hellcat V8
The most popular, highly sought-after third-generation Hemi engine is the famous 6.2-liter Hellcat V8. This engine was born when Chrysler engineers mounted an enormous 2.4-liter supercharger on top of the already powerful stock Hemi V8.
The result was astonishing with 707 HP and 650 lb-ft. It is one of the most powerful street-legal engines currently on the market as well as one of the most powerful muscle engines ever. They first intended it for installation in the Challenger Hellcat. However, due to high demand, it is available in the Charger Hellcat and from 2018, in the Jeep Cherokee Trackhawk, too.