Ok so I'm going to upgrade my exhaust on my 00 5.4L 4WD Expy. I wanted to do some long tube headers but can't find any specifically for it. I was looking at a set of pacesetter LT's #70-2227 that are for a f150 5.4 4WD they have good reviews and a good price but will they fit? Also what do you think about the rest I'm not sure how to configure the whole thing I'm not proficient when it comes to exhaust. I was thinking a couple of high flow cats maybe a dual in 3' out flowmaster 70 series or an x pipe and dual but not sure what muffler i'd use if I went dual allthe way yet.