Removed my cats earlier. Made a big difference sound wise. Only thing im worried about is the smell.. is it possible to get carbon monoxide poisoning? I went for a few spins earlier, got home and felt really sick for some reason. Ended up falling asleep cause i felt really nauseous. I had been driving with the windows down the whole time. Dont know if driving with the windows up will be better or worse. Or with the AC on or off. Any advice? Thanks.