[dw1]

Yes, you will be the one guilty of melting the north polar ice cap, depriving the polar bears of their habitat, and causing uncountable death and destruction.

On the upside, your efforts will result in D.C. being underwater, so it's not all bad.

Seriously, the car may run better with the mods, but that is likely because it is masking other issues - like the need for a good tune-up or something more serious. I have to wonder if the car without the cat still has its full compliment of O2 sensors and the other mods to have the ECU work properly.