I think that the whole system is the exact same, I know the down pipes are for a fact, I would emeil zzp just to be sure but I dont see any differences looking at mine
FYI guys,the downpipes from the 04+ will not fit in a 97-03 body without some work. Like banging out the tunnel quitea bit and possible some trimming. We tried this about a month or so ago and it will not clear the tunnel because the cat is in the the wrong location. The 04+ exhaust tunnel is alot bigger.
as far as the rest of the exhaust we have not had a chance to test fit it on the older style GPs.