the 07 2500 sub is 4wd, my old tahoe is 2wd, so you're workin off of 4wd headers, no idea if the 2wd would be an easier fit on these new things...

 

pacesetter lt's fit the nnbs 2wd trucks. just not 4wd. the front differiental mount blockes the drivers side but the passenger side works. If a person wanted to do some modifing he could make them fit, i just didnt wanna go to cutting and welding on a new truck and headers....

 

Finally got my dynatechs on today..
headers fit perfect on 2wd, but had to modify their cats/y-pipe to fit
supposed to fit nnbs

sounds MUCH more aggressive/sharp than with just 3" cat back. louder but good.
haven't been on highway yet and hope the are not too loud cruising.
also, so far, sounds like **** when dod kicks in

pics tomorrow...

 

All these headers will fit a 2wd except the ones that are $1500.00, surley someone has a x4 nnbs that have put lt's on it....