Review on Dorman 673 439 Integrated Catalytic Converter by Tyrone Carter

The flange bolt holes on the outlet side of the boiler did not match the stock flanges that fit, had to be enlarged with a file to allow the bolts to go through. In addition, they put the collector's metal seal in a thin cardboard box, which was in the same box as the collector and the cat, which could move freely in the box, so it was inevitably slightly deformed during transportation, like other reviewers. pictures posted. Aside from these two issues, everything worked fine, no codes. I haven't bothered with it yet, but with this device it's not a problem. Attach this flange and don't skimp on the packaging material so nothing dangles in the box and it's a five star rating.