webmastir wrote:I don't think it's something that needs to imminently be fixed, but you do have to address that problem eventually. You won't be able to do emissions testing w/ it...so that's a bummer. There are prob some other things to consider, but as far as i remember, there wasn't anything that was too serious. I drove with it for a little while.
Waits for others to chime in...
may affect fuel mileage & emissions
in a rare case, because of valve overlap, if the cat is failing due to deterioration rather than simple clogging, debris could be sucked into the exhaust port and result in valve, piston, and/or cylinder wall damage