Convert your 2003-2005 Ram with 4-pin injector connectors to the 2006-2018 6-pin injector connectors with the Fleece Performance plug-and-play conversion harness. This conversion harness is for use on a 2003-2005 Cummins where a 2006 and newer rocker box style is used. Produced in-house, Fleece's manufacturing process includes fully automated wire cutting and terminal crimping to ensure you get the highest quality replacement parts you need!