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!
are you bale to pass emissions and did your CEL come on?
2008 ///M3 alpine white: KW3 with EDC, Chanllenge CF front lip, matte black grills, matte black gills, Eisenmann race w/ connecting pipes.