Since i grow up in montreal/eastern townships,i will tell you that most of the bolts will be rusted and most likely will snap if you try to change them yourself.
A full replacement(cat back) will cost about $300.- $400.(i'm trying to remember what i paid.(but i've been drinking).
If you can get the bolts off it isn't that hard.
For not much more you could get a aftermarket exhaust.

As far as the pullies go, IMO they are waste of money.The gain isn't worth the canadian price.