Originally Posted by JohnSellers
Why shouldn't I now go ahead and try a high flow converter - can't be any more problematic than keeping the stock exhaust system?
Related question - does the rich-running nature of these cars cause any problem with catalytic converters? Can the excess fuel (with periodic afterfire) destroy the element? If so, then it's likely to happen with a HFC also - right? Does that make the track pipe a longer-lived solution?
Don't take my word for it, but this is what I heard:
Running rich will melt the cats eventually.
I also read a related issue of people's cats melting because of untuned BOVs.
OBX has resonated test pipes, and your exhaust will be loud and raspy still.