nope! i have one of my exhaust without it lol :-P

 

I actually planned on taking the cat out. the cops around here are not too bad so i dont think i will have a problem with the extra noise. i also plan to do the sparkplug defouler mod for the 2nd o2 sensor. here the emissions test isnt too bad pretty much if your not throwing a CEL your good.

 

LOL, I'm guessing you have heard it then!?