Questions about what cat converter

[plainzwalker]

So I found out yesterday that they did NOT move the cat converter from the stock exhaust to my new exhaust when I the swap/exhaust done. So it looks like they just installed a straight pipe instead.

Question is, what is the major difference in functionality between a hi-flow cat and a standard cat? I am thinking of getting a hi-flow one since they have 3" ones from Catco, but if it will still make me fail emissions then I'll try and find a standard cat.

Input?

Thanks

[SpeedRacer1]

Keep the cat. No power difference should be found, this only changes when you are getting higher hp numbers. The stock cat does the best job of keeping emissions low.

[plainzwalker]

Don't have a cat, looking to get a cat. I have 3" turbo back exhaust as well...