Cummins Valve Cover Conversion Harness (03-05 to 2006+)Convert your 2003 2005 Ram with 4 pin injector connectors to the 2006 2018 6 pin injector connectors with our 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, our manufacturing process includes fully automated wire cutting and terminal crimping to ensure you get the highest quality replacement parts you need!