I have a vortech mondo on my novi 5.4 It's mounted right next to the blower (blow through). I thought it was going to be obnoxiously loud that so loud I wouldn't hear the whine of the blower. But that wasn't the case.
Here is a short vid..
https://www.youtube.com/watch?v=Div_c4aPlYI
-Mark
Is that vented to the atmosphere?