My ultra flow was very quiet when I first got it, stealth mode on. After I cammed the car it got a little lounder but its still very quiet. You can barely hear it going down the interstate. Stand on it though and the thing opens up quite nicely.

 

anybody know how much a dynomax muffler would be? thanks for all the help guys, hope it gives me what i want.

 

If you buy the full cat-back Borla is not for you. However, there standard mufflers that don't come with the block off plates have a very different tone. It's low and pretty mellow at idle and low acceleration, but hit WOT and it roars up top. I really like the rear section Borla I bought. My only complaint is that at idle on the freeway it's really boomy, but that might be just my convertible.