Convert your 5.9L CP3 to a newer 6.7L CP3 style pump with our Fleece Performance exclusive 5.9L to 6.7L adaptation kit. The kit includes a new high pressure fuel line, high flow feed and return fittings for the CP3, CP3 feed line and hose clamps. Application Notes For use on 2003 2007 5.9L Cummins engines equipped with a 2007.5 2018 6.7L Cummins Bosch CP3.