SWISS PART For 3C3Z-9A332-AA Stand Pipe for your 2003 6.0L Powerstroke is the early screw-in style for use on models built before September 30th, 2003. These models will have the ICP Senson the HPOP cover.For 2003 - EARLY 2004, 6.0L DIESELThis kit will fit 2003 F-250/350/450/550 Super Duty 6.0L 363Cu. In. V8 DIESEL OHV TurbochargedOil System Stand Pipe for the 2003 and early 2004 (Round Style EGR Cooler vintage) 6.0L Diesel.There is one stand pipe per cylinder head. These stand pipes conduct high pressure oil from the branch tubes to oil rail.Its a great idea to change and update these parts if you are going to have the valve covers off. These parts have o-rings (two) on them that can start to leak.If you are changing your injectors, head gaskets or just even have the valve covers off, these are good parts to service/change for maintenance purposes.