I must to replace my catalyic converter on my my 98 s70. Has small rust holes and it is throwing codes. Anyone have experence with aftermarket cats? I have heard good and bad and am looking for more info. If you have brand specific info please share. I would prefer to stay with original parts, but at just under US$1000 for the cat alone, I must investigate alternatives.
Also I have had a look at the coupler between the cat and the rest of the exhaust system to the rear. Mine is very rusted and I would like to replace both halfs. When I cuts the what I assume were bolts (now rusted to the point I can not tell if it was originnaly bolted ot riveted) is there a sealing ring or so called doughnut in there?
All tips and suggestions welcome.