Quote:
Originally Posted by klhansen
Think of it this way.
It takes energy to make noise, and that energy could be put to better use making air instead.
Just a thought.
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or maybe the blades are little more aggressive moving more air and that makes it whistle more......regardless, comparing both the WW "looks" like it would move more air, and  wants it to be quieter, of course.......imagine people test driving it and getting "annoyed" by a loud whistle 
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2000 F-350 7.3 PS ,4R100 Lariat Dually
http://i829.photobucket.com/albums/z...DSC02732-1.jpg
4x2 LB 3.73 gears, 115k miles(better than new)
6" Fabtech lift w/ duall steering stabilizers
22.5 polished Freightliner wheels
Triple Clutch Triple Bearings Billet Low stall Converter.
Wicked Wheel
Full Turbo back 4'' exhaust,
Triple Autometer Phantom gauges on pillar,
Now using SCT 100hp Performance tune. 
Wastegate disconnected for now...
2005 front clip.
Train horns.
Zoodad mod.
CFM-plus
CCV rerouted
S&B CAI
IC pipe ceramic coated w/ foil delete
Inlet heater deleted.
3 tv's + Backup Camera,DVD,Nav.,Satelite Music.
Jason smooth topper.
Here but not installed: 4'' Ported Housing,ATS 1.00 a/r, non-ebv pedestal and outlet,turbo master actuator,203 thermo.,billet thermo. inlet.,TRU Cool tranny cooler (no time  )
Pictures: http://photobucket.com/2000_F350
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