Fits 6.0L Diesel build after 09/2003, with "wavy" fuel rail design
are the new improved oil stands that have the integrated check valve and nylon backup washers.
The improved version retain engine oil at the top of the engine to help
the system reach operational pressure as soon as you turn the key. This
upgrade reduces the total number of rotations it takes to start the
set of two each: High Pressure Oil Stand Pipes and Dummy Plugs for the
Ford 6.0L Diesel. These stand pipes and dummy plugs are great for
preventative maintenance in terms of preventing high pressure oil
problems. These parts fit all Ford 6.0L made with the square style EGR
cooler (9/22/03 and later).