The Edelbrock E-Force Supercharger system is a STAGE 3 Pro-Tuner System that delivers excellent horsepower and torque for your 2011-14 5.7L HEMI Chrysler 300, Dodge Charger or Challenger. The gives you all the essential components needed 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.