i need some high flow cats and i was odnering if someone could help me find a good brand. right now i dont have ne on and my exhaust it estremely loud but i like the sound. i just wanna put cats on and needed help findin some. and another thing what kind of different sound would it give me if i had 3inch outlets on the cats and ran 3inch pipe all the way back?

 

The larger the pipe, the better the sound will resonate out of the exhaust system. I used magnaflow jeep 258 6 cylinder cats.