Aeroturbine
Okay Guyz'n Galz'n Scott.. i'm guna throw this in here. Not mentioned much on SDD, might be a "Pandora's Box" for some, so be gentle ?
@ about 20K, went I did my 4" stuff, I installed an AeroTubine (resonator). Goes on right at the bottom of the down-pipe where it bends toward the back.
Takes advantage of the Post turbo pressures & flow, and acts basically like an Exstractor.. on a 2 cycle. kinda Sucks the exhaust away as throttle inputs increase ?
I Swear by the dang thing. I'm Hard Pressed to get EGT's over 900*.. no matter the pull, up a grade.
AND.. it removes the Turbo "Chuff" from the exhaust note.
My 4" set-up goes on thru a MagnaFlow and out, via a Turn-down tip.
I've gotten many'a compliment on the Healthy, Throaty.. but Not Loud.. sound my 7.3 makes.. as I go by folks... with my Foot In It. (like at rest Stops'n such) (stop lights too)
You can check it out at the site DaveBen found, (after mine dint' work)
sly), to name just one site. and I think there's some stuff on "you-tube" too ?
'ol Joe