Choose the package you want from the drop down menu above and to the right. PP-BU-42566 - 2003-04.5 Cummins Power Pup Downloader PP-BU-42567 - 2005 Cummins Power Pup Downloader PP-BU-42572 - 2006 Cummins Power Pup Downloader PP-BU-42568 - 04.5-05 Cummins Power Pup Downloader with Crazy Larry Program The Power Pup Downloader is much like the Triple Dog Downloader except that it can't be used on different make trucks. It can be used with the Outlook monitor if you want to upgrade later. Just plug into the OBDII port under your dash and download the power into your ECM. This downloader boasts the highest horsepower of any downloader on the market, but also the lowest EGT's. This downloader is effortless to use - you don't even get your hands dirty! When you want to change power settings, just plug in, download the new power program, and enjoy the power. It allows you to set power to tow, sled pull, drag race, off road and more. You can also show and erase diagnostic trouble codes. You'll increase fuel economy (if you can control your right foot), and it will even run external devices using the PTO function (if your truck is equipped with a PTO device) by raising your vehicle's RPM from the downloader. So many benefits from one simple unit. Here's what Bully Dog says about the downloader: The Power Pup Downloader is for those looking for more power for towing and performance, or for the extreme driver looking to decrease their time in the quarter mile. This is the first product of its kind on the market for the 2003-2005 Dodge Cummins Turbo Diesel. The Power Pup increases horsepower and torque be re-flashing the vehicles Engine Control Unit (ECU). Installation takes place in-cab by plugging the Power Pup into the OBDII port. The Power Pup gives the user four horsepower settings to choose from: Stock, Tow (50-70 hp), Performance (75-90 hp), or Extreme (95-230). The Power Pup retains the stock program so the truck can be put back to the original settings if the need arises.