2003 Jeep Grand Cherokee Performance Chips

    • SUPERCHIPS®VIVID LINQ Performance Chip
      Jeep Grand Cherokee Gas 2003, VIVID LINQ Performance Chip without tablet screen by Superchips®. This controller unit for your gasoline-powered vehicle offers all VIVID Paq functions, but without the tablet screen. Connects to most...
      # 1250926
    • SUPERCHIPS®TrailDash Tuner
      Jeep Grand Cherokee Gas 2003, TrailDash Tuner by Superchips®. Specially created to enhance the off-road ability of Jeep vehicles, this tuner control board links to your main vehicle computer in order to lock axles, transfer cases,...
      # 1251123
    • SUPERCHIPS®Flashpaq Tuner
      Jeep Grand Cherokee Gas 2003, Flashpaq Tuner by Superchips®. This compact diagnostic programmer connects with any OBD II compatible gasoline-powered vehicle to adjust levels of horsepower and torque most beneficial to towing,...
      # 1251337
    • BULLY DOG®RAM Mirror-Mate™ Mounting Kit (for Triple Dog GT and WatchDog)
      Jeep Grand Cherokee 2003, RAM Mirror-Mate™ Mounting Kit for Triple Dog GT and WatchDog by Bully Dog®. Adds a Ram-Mount ball mount between the OEM mirror and the mirror button glued to the windshield glass. Does not affect...
      # 42488667
    • BULLY DOG®WatchDog™ Monitor
      Jeep Grand Cherokee 2003, WatchDog™ Monitor by Bully Dog®. Monitor multiple vehicle parameters. Plugs into OBD-II port for easy installation. Mount permanently or suction cup to windshield. Great for tuning or towing. Tracks...
      # 42491779
    • HYPERTECH®Max Energy Programmer
      Jeep Grand Cherokee L6 4.0L Gas 2003, Max Energy Programmer by Hypertech®. Regular Fuel: HP Gain 14, TQ Gain 15, Premium Fuel: HP Gain 15, TQ Gain 24. The Max Energy Programmer series provides high levels of power and economy for...
      # 1684163
    • DiabloSport®Trinity Analog Cable
      Jeep Grand Cherokee 2003, Trinity Analog Cable by DiabloSport®. For vehicles with a tight amount of leg room, this accessory OBD II cable features a 90 degree bend to route the cable out of the way of your knees. Extremely useful...
      # 26901070
    • DiabloSport®Trinity Suction Cup Mount
      Jeep Grand Cherokee 2003, Trinity Suction Cup Mount by DiabloSport®. This is a replacement suction cup mount for all T1000 units. This item has universal fitment to all Trinitys and is a service replacement for lost or damaged...
      # 26901071
    • JET®Performance Module
      $303.70from $242.96
      Jeep Grand Cherokee 2003, Performance Module by JET®. Improve Horsepower And Torque. Easy Install. Improve Throttle Response.
      # 13555902
    • JET®V-Force Plus Computer Chip Programmer
      Jeep Grand Cherokee 4.7L 2003, V-Force Plus Computer Chip Programmer by JET®. Increase Horsepower And Torque. Improves Performance Throughout The Rpm Range. Backlit Lcd Screen. Improves Performance. Variety Of Mounting Choices.
      # 13546219
    • JET®Accu-Speed Speedometer Calibrator
      Jeep Grand Cherokee 2003, Accu-Speed Speedometer Calibrator by JET®. Interact With The Speed Sensor On Late Model Vehicles. Corrects Transmission Shift Points. Connects To Transmission. Adjusted With The Turn Of A Switch.
      # 13546653
    Guides & Articles
    Are Superchips Really Super?Are Superchips Really Super?
    Although most automobile manufacturers try to achieve a balance between performance and emissions when the ECU is programmed, in reality more power can be obtained when certain engine control parameters are changed. Aftermarket superchips are made to adjust parameters to increase engine power and torque. The superchip gives a “boost” to your vehicle’s...
    The throttle controller will basically bypass the computer in the vehicle. It is designed to take the information right from the accelerator position sensor and compile it in a high speed controller circuit that compiles the signal sent from the Accelerator position sensors. With this controller you are able to program it to different options and the throttle...