If you want to put those V8 guys in a corner all in one go, then a Mustang V6 supercharger kit is what it's going to take. These powerful centrifugal supercharger systems from ProCharger can give your 3.8L Essex motor up to 324 horsepower which will have your Mustang dancing around the rest of your competition. These systems have highly-advanced designs that provide enormous amounts of charge air to your engine, all in a 50-state street legal package. If you're throwing on that much power, you should consider a few 1999-2004 Mustang suspension upgrades to keep it all under control.