IF its going bad what would be the symptoms I hit it and hear some pieces bouncing around but won't they clog it up soon. What will be the benifits of getting a high flowing one. Is it even worth the money.

 

Well, the easiest way to find out if it's bad is to get an emmissions inspection... if you fail, it's probably a bad cat. I have heard mixed reviews for those high-flow cats, but if you do need a replacement you might as well try one... or you could just get a stock cat and a striaght pipe, that way you could have no cat for daily driving, and throw one on when you need to pass emissions. There is just something morally wrong with that though, plus its illegal

 

I hear Carsound makes a good stock-size replacement cat.