I am picking up a used Invidia from a member on the board on Thursday. The exhaust is made for an MY00-03, but I have been told by numerous members that all that needs to be done is a hanger modification.

Does anyone know what needs to be done to the hangers?
Would I need to take it to a muffler shop or is it something I could do on my own? Has anyone done this with good results (no shitty fitment, mufflers going in different directions, etc)
How much should it cost (I was told like $25-$30 from some members)

TYIA!