There are many relatively simple ways to add horsepower to your car's engine, such as installing a better intake, reprogramming the Electronic Control Unit, or swapping in a freer-flowing exhaust ...

Luckily, the aftermarket has found a way to make the twin-screw superchargers available on every version of the Hellcat's 6.2 HEMI compatible with the underpowered 5.7 HEMI. Read more: Major Car ...

It costs $11,995 and includes a larger 3.0-liter twin-screw supercharger, a 105 mm throttle body, and high-flow fuel injectors that are capable of providing up to 164 gallons (621 liters ...