[projectRDM]

Unbolt the EGR valve from the mounting plate, don't try and take the pipe off the valve.

For the studs, the double nut technique works, or use a stud puller, and once they're out replace them with regular bolts so next time you don't have to fool with them, I used to do that on every engine I worked on just for ease of labor later.

Take the support brackets off and throw them in the scrap pile, you don't need them. Even after they're off though the plenum won't drop low enough unless you remove the oil filter and alternator.