Please Note : Communication is the best way to solve problems. If you have any problems after purchase, please contact us in time before opening the return . We will give you a satisfying solution. Description : Replacement for 2003-2009 Dodge Ram 2500 3500 5.9L Diesel Cummins Common Rail Part Number: 904-322, 904-323, 5086871AA 5086872AB 5086873AB 5086874AB 5086875AB 5086876AD Made with ST52 high-quality galvanized steel material, improving the durability. Kits for all 6 cylinders 1, 2, 3, 4, 5 and 6 The injector line effectively circulates fuel through the injector to restore the correct operation of the fuel injection system. .