Getting ready to upgrade

[Jester4kicks]

Ok, I'm going to have the exhaust professionaly installed, I got with a guy that did 2 of the mustangs at my work. We're going to cut the exhaust just after the cats, use the stock pipe for 1 side and fashion a new pipe for the other in h-pipe style, and finish it off with 2 chamber flowmasters.

He gave me the option of making a new pipe instead of using the stock for one side, he's going to cut the stock pipe before the muffler and right before the slight taiper that ford puts on the pipes. If I want a new pipe it'll add $100 to the install which is sitting right now at $525 parts and labor, is it really worth the new pipe? There's nothing wrong with the existing pipe and I don't want to increase the diameter.