taking out the resonators

I was just wondering, before I did anything I would regret, does it do anything to your perfomance to take out your resonators. I've heard the air flow is better without them and they are just there for engine noise. Any knowledge will be helpful.

Check here.

http://www.xterraownersclub.com/cgi-local/ultimatebb.cgi?ubb=get_topic;f=70;t=000190