Got a 2003-2007 Dodge Ram 2500/3500 with the 5.9L Cummins and the 48RE transmission? Upgrading to stainless steel transmission cooler lines is a smart move. This kit includes three braided stainless steel hoses: one from the transmission to the heat exchanger, one from the exchanger to the factory cooler, and one from the cooler back to the transmission. It also comes with the necessary -8AN to NPT fittings, hose barb adapters, and seal tape. These lines are way more durable than the stock rubber ones—they handle heat and pressure better, resist corrosion, and just plain last longer. Installation note: you'll need to remove the factory copper fittings on the transmission first, and keep the fittings on your heat exchanger. The barb adapters connect to the existing rubber hoses at the front cooler. A straightforward upgrade for better cooling and peace of mind. Comes with a 1-year warranty. This description gives you the install tips and is over 592 characters.