It depends on the size of the muffler(s) you get. I am running a stainless Maganflow 2.5" dual in/sual out single muffler. It is 22" overall. 5x11 I think. I am running coates Pacesetters,no cats, and 2.5" mandrel all the way around. The only x-pipe I have is the internal one in the muffler For a year I didnt have any tips or turndowns. It was jsut straight muffler and it was no where near as loud as you would think. Why? Becuase I didnt get the 4x9 muffler becuase that would have been ridiculous and probably would sound lik ***** IMO! You could definitly hear it and at WOT it would roar. I finally put some turndowns on and it became ALOT quiter. Then last week I swapped my 212/218 cam for a TSP Torquer v.2 and let me tell you it became a whole lot louder. So if I was you I would get the big muffler or at worst the one right uner it.

 

yea, my exhaust was at least twice as loud just switching from LS6 to the F5 cam....but i think loud is nice and it will be even nicer once i switch to some LT's