did you hear that??? would someone turn off that hair dryer!!!
what kind of difference did you get with the different turbos? im not too familiar with the 6.0 turbo setups, thought they were all the same from 03-07
In 2003 the 6.0l turbo had 10 vanes on the exhaust side so it whistles like crazy with a straight pipe. In 2004 Ford changed the turbos to 13 vanes on the exhaust side for 'improved sound charachteristics" Other than the sound there is no difference.
Passenger front window is down. It's audible with all the windows up but not that bad. If the windows are up and the radio is on you can hardly hear the turbo. On the highway it's not noticable at all.