I'm looking at putting some headers on my 97' F350. I'm seeing you can get them with or without the air tubes and the y setup. I'm guessing I'll want to get headers with the air tubes and keep my egr system for my tow rig. And I understand that the y pipe setup gives you more torque. I'll probably build my own 2.5" system on back from the headers. Just wondering if anyone has some input on this before I tackle it.