What kind of cats are you guys running on a 3inch system? any idea of the cells per inch and the cfm?
I'm looking at getting one that has 200cpi and flows 525cfm, sound any good? its one of the round type ones not the classic resonator looking one.
Opinions, good/bad.

Well, I picked up a 3 inch magnaflow for 130 on ebay..

It's being used on a 2.5 inch exhaust.. sleeved down to fit.

I think from an emissions perspective the creamic ones are better, but for flow the others are. (but thats only me and an exhaust dude speculating.)

I'd be very surprised to find my cat was restricting my exhaust much.