Have any of you ever tried the Vortex Mufflers? I just cheaped out on my 6.9 diesel and got a 3" single in dual 2.5" out Vortex V-Baffle muffler for it, did the install and I have to say, I have alot more power then the HD super turbo it replaced, the truck sounds alot better too, its loud but almost no snap, with the exception of when it is almost on the governor. Sounds like a 460 that a guy I work with has, he has a flow 50 on it.