Originally Posted by Fen335i
^ You will see very very similar gains. And perhaps a bit cheaper depending on the shop. Mine cost $300 installed with welds and it turned out really well. Paired with a Dinan rear exhaust it sounds absolutely perfect and no drone. The power gain is very noticeable.... as others have said it does need to be finished off with a tune though. That's my next step. Good Luck!
Did you ask them to extend the pipe on the driver side to get rid of this nasty stock kinks on the stock driver side pipe? I'd love to get rid of those.