This system is 100% complete, including Whipple's Gen 5 3.0L supercharger, high-flow fuel injectors, oversized heat exchanger, a flash tool with a unique PCM calibration, and all the pre-formed & fitted hoses with all the necessary wiring connectors for a easy installation. The calibration is for stock trucks or those with a catback only, just bolt on and drive. 50 State Legal: CARB EO #D231-71.