Includes all components plus a remanufactured 4.3L Chevrolet throttle body to convert a 2BBL CJ or Wrangler Jeep to EFI. Specify type and year of Jeep when ordering kit. Emission legal version CARB EO#D452. Many original emission controls are eliminated, which simplifies underhood area. ECM installs under dash. High pressure fuel pump must be installed in main fuel line from tank, and bypass fuel returned to the tank. Harness includes diagnostic connector, and diagnostic is similar to 1986-92 GM pickup truck.