I couldn't agree more with jrs3800. I just kicked my cat yesterday, only to find it'* all crumbled to bits [was fine when I put the exhaust back on.. but now its shot]. And it sounds that way too, the car sounds a little weird. Even though I cannot afford a new cat, I am also not going to just hollow it out or install a straight pipe.
blazinlo does make a point, not all cars are EFI. There is no shortage of 500ci engines with carburated engines that are driven on the street [I wouldn't say regularly.. but are street-driven]. What about them? I'm sure that those cars don't have a catalytic converter, or an O2 Sensor to measure the AFR. Although a lot of them are tuned very well, to perform their best, they also burn a lot of fuel. That'* what happens when you have a piston the size of a human head.
I may not care a whole lot about the environment, I won't go out of my way to pollute it.
'89 SSE - GX3 -190k, 155k on body - Back for another ride.