2003–2004 5.9L Cummins Engines & Engine Parts

Model year 2003 marked the pickup 5.9L Cummins transition to high-pressure common-rail fuel injection. Industrial Injection separates 2003–2004 from the later 2004.5–2007 group because several fuel and air-system applications change at that break.

Industrial Injection's catalog for this year break includes stock and upgraded long blocks, short blocks, cylinder heads, Builder Boxes, overhaul parts, pistons, rods, camshafts, bearings, gaskets and girdle systems. That gives you options ranging from individual repair parts to larger engine-build components. Do not assume every 5.9L or 6.7L internal part crosses between generations.

Treat 2003–2004 separately from 2004.5–2007 and verify the exact model year and current fuel or turbo component number. For short blocks, long blocks, Builder Boxes and cylinder heads, also review the exact included components before ordering.

Related Cummins collections: Fuel Injectors & Components, Injection Pumps & Fuel Supply, Turbochargers & Turbo Parts.