[Christ]

Originally Posted by j.reed

I was about to say that...cats are designed to recduce CO, NOx, and unburnt fuel. Not co2... And yes a good quality performance cat will flow more than your engine, so there really is no gain to be had. I do not believe in the whole global warming(as a way of life, not the theory) but i DO believe in cleaning up the air. If youve ever driven a car without a cat, youll want one back. It stinks and gives you a headache even with the windows up

I haven't had that experience personally, but I do also keep my vehicles tuned to run within emissions limits regardless of their purpose (race cars don't get cats, but I do drive them to the track, as I keep them in street legal classes.)

I can get the cars smogged by a friend of a friend for $20 after hours, but there are no emissions testing procedures around here that I need to pass, including (in some cases) visual inspections.