The Edelbrock E-Force Supercharger system is a STAGE 3 Pro-Tuner System that delivers upwards of 651rwhp and 626rwtq for your 2005-10 6.1L HEMI Chrysler 300, Dodge Charger or Dodge Magnum. The gives you all the essential components needed in order to build a custom supercharged race setup. Customer MUST purchase a heat exchanger SEPERATELY. For safety, the Edelbrock supplied program will retain the factory vehicle speed limiter setting. This unit is NOT supplied with a Programmer.