It could be true, if the aftermarket converter is not as efficient as the OEM.
Unless you have a California model, the converter assembly sells in the aftermarket for about $300.
On a gas engine you don't. The check engine light will come on if you tamper with the converter, you will not be able to turn it off. The engine will also suffer from lower fuel economy and performance. I agree, with the above post. It is also illegal to do this. Why would you want to do this in the first place unless your converter was clogged, which is highly unlikely on a 2002 vehicle? Leave it alone, there is no positives in removing it and plenty of negatives. On a diesel just buy a complete aftermarket straight pipe system.
Not unless it is clogged or damaged. You cannot run the car without a converter if that is what you are asking. It is illegal and the engine will not run properly with the converter removed.
The 2.0L engine in all zx2's(98-03) are NON-interference engines unless the head has been milled and/or aftermarket cams have been installed...
No, unless you have the really high lift, aftermarket camshafts (you would know if you did) the 3.0 and 3.2 SHO are non interference engines.
CC stands for cubic centimeters and in is referring to the displacement of your engine (The size of the chamber for burning fuel.) Higher cc will always be more horsepower unless you get into aftermarket modifications on the engine or fuel.
You don't have to change or remove the converter unless the converter is stopped up.
Unless the catalytic converter is actually clogged (which it probably isn't, or you'd know it), you won't gain anything except a check engine light which won't go away.
If you have an aftermarket anti theft system installed in your car, it may have a bad ground which will cause the engine to not stay running.
Not unless you intend to modify.
No, unless they specifically told you it had the original engine. Does the engine in the vehicle now, run as it should? If so, what is your problem? They sold you a car with a good serviceable engine. Unless you were buying a collector car where having the original engine makes the car worth more, this is really a mute point. You are assuming the original engine would be better than the one it now has. That is not necessarily the case. Drive and enjoy your car, and forget the fact that the engine has been changed. This is not fraud in any shape or form. Replacing defective engines in used cars is done all the time. If they had sold you the car with the original defective engine still under the hood, would that have made you happy?
You don't. The check engine light will come on if you tamper with the converter, you will not be able to turn it off. The engine will also suffer from lower fuel economy and performance. I agree, with the above post. It is also illegal to do this. Why would you want to do this in the first place unless your converter was clogged, which is highly unlikely on a 2002 vehicle? Leave it alone, there is no positives in removing it and plenty of negatives.