I went to an exhaust shop with my dad and to be curious I asked how much it would be to add Magnaflow Dual exhaust to my car and they said $375. I was about to order the Magnaflow Dual Catback off American Muscle for $638. If I went with the shop would an X pipe be alright? Also, if this was your decision which would you pick? I don't have enough money to re-do it if I don't like it. I'm just a little nervous with the shop price being so much cheaper that it makes me wonder if there is something fishy. Opinions appreciated, thanks.