downpipe catted catless

First off need to recognize that this is a company that is going to make a difference that some of the high dollar people need to take note on. They have a price point that is fair and quality that is 2nd to none. Add to that an exceptional support/sales teams that actually respond and listen...

Catted or Catless. No emissions here in South Florida, what's everyone's opinions on the available options we have for downpipes to get the most power out of our 2.3's without spending more money than needed?