What is a big line kit for 1998.5-2007 Dodge Ram 24v Cummins?

GlowShift’s 1998.5-2007 Dodge Ram 5.9L Cummins 3/8” Big Line Kit upgrades the restrictive line and enables you to easily install a fuel pressure sensor for extremely accurate readings directly from the source. This 5.9L Cummins Big Line Kit replaces the restrictive line from the fuel filter housing to the injection pump and lets your diesel truck’s fuel system flow the way it was intended!