Should I replace my Cat Converter?

[BlackGuy'sHonda]

I just recently got my cat-back exhaust system installed like 2 weeks ago and I noticed that there is a metal rattling noise coming from under my car. So I took my car back to the place that installed it. They showed me it was my original cat converter. When you press on the gas you here it rattle. So the guy told me I should replace it. He gave me two options, straight pipe or a new cat. Now I asked him which one is better for performance. He said straight pipe. Is this true or should I just get a new cat converter?

[blazenem]

if you have to do emissions in your area better get the new cat..plus it will be better for our lungs lol...might loose performance or gain will never know unless you know how to calculate how the loss of back pressure will affect car. and what type of performance mods do you plan on doing? ...

[Skeet Skeet]

If you get a straight pipe on a stock ecu, the F22A will fall flat on its ass at 5000. If you are automatic, you will notice your trans will shift to only 5500 because it lost power haha. And another thing is the resonance you will face getting rid of it. I deleted my cat on my CB a while back and when I had the stock exhaust, it produced the nastiest ungodly dreadful noise when I pressed the gas. However, if you can get past the resonance, and can afford a tune, you won't have any problems getting rid of it. If you normally drive and you aren't a performance freak, then I don't see a problem deleting it.

[BlackGuy'sHonda]

I checked on the Illinois emissions testing website and only 1996 and newer cars have to take this test. So that's a plus for me. I have a 5 speed manual, I won't be doing anything to it if I had an automatic. The only mods I've done so far is added a cat-back exhaust with stock manifold which I plan to change next, and a short-ram air filter.

[Skeet Skeet]

I would slap one back on if you don't plan to get tuned.