Do you have any mods on it or not? Without any mods I'd say not worth it.

 

I have a stock 2000 monte carlo ss and I was woundering if it would be worth buying a performance tuned ecm off the internet, does the retuned ecm make a huge difference that's noticeable for the money its worth? or should I just keep saving. So for someone who got this done to there car please let me know what you think.
thanks

 

no mods all stock

 

Mod first, tune last.