A HEMI supercharger kit is the fastest way to add major power to your vehicle. All kits are a bolt on item that does not require custom fabrication. A 6.4L HEMI can expect 150+ RWHP with a completely stock engine. If you have a Hellcat the 4.5L Whipple can take you from 640-660 RWHP to 1200 RWHP with supporting modifications. We carry a supercharger kit for all modern HEMI engines. 6.4L, 6.2L Hellcat, 5.7L, and 6.1L engines all have options that will bolt directly onto the engine as if they came from the factory that way.