I had this done to my 85 300sd, new turbo and all, but i dint get a new exhaust system, only problem is that i have no power now.
Before i could hear the turbo spool up and feel it, now i cant hear it or feel it. I guess its cause my old trap disingetraged and had no restriction and the new o2 catylist creates a lot of restriction. oh well got a free turbo.