if i got a 3.5 inch cat or what ever size can i shove a pipe smaller in diameter like a 3" through it and remove the honey comb, so it looks like i have a cat? i dont want a hallow cat it will choke the exhaust, due to the odd shape,

 

just run a straight 3" exhaust no cat. then take a cat, and gut it and cut the shield around it off, then reattach it to your pipe where the cat used to be. and weld it shut on the other side.

 

Yes, you can do it. It's illegal though, just letting you know.

 

well im sure he knows if hes going through the trouble of a piped through cat, but ya know.. in california, thats the cool thing to do!

 

LOL, I am in MA and I am gonna need to "lend" my buddy a few bucks to give a sticker.

For some reason I don't think my 500 HP 383 with LTs and dumps is going to pass, hahaha. Might be the N2O or the 335's out back, or maybe the fact that there are no cats, hehe. That is def the last thing to worry about.

Shove a pipe through. If you can think it, chances are you can make it.

 

just do what travis said eric, best way.