2.5" pipes are to big, they'll probally give you decent sound but they have to much flow for that v6 and you might lose some hp. try and find some that are 2" or 2.25". i think 2" will give the most hp but not quite sure; however they'll will both give you good sound.
2002 v6 manual, SSM P&P Heads, Comp Cam from SSM, and some other stuff full list in profile.
214 RWHP, 215 RWTQ :tongue
"The trouble with our liberal friends is not that they're ignorant; it's just that they know so much that isn't so"