Should I use two cats in the y pipe or 1 cat after? Also has any one used these cats? http://cgi.ebay.com/ebaymotors/3-0-C...QQcmdZViewItem

Thanks for the help

 

In terms of power loss, you probably won't notice a difference between a one or two cat setup. It is your call if you want to run two or not. I ran two mini-cats in my off-road y-pipe just to try to keep my car somewhat to the stock standards. I'm not sure about the cats in the link, they seem like a good quality part though.

 

I put one of those exact kind after the y-pipe, didn't notice any difference in power and very minimal sound loss.

 

i'm going to be putting a hi-flow cat after the y-pipe once i get my headers. it's fine either way you want to do it.