Get the whirling high pitched sound from the Turbo Charger? I have heard some in my town that sound like a Peterbuilt 379 sitting at the stop light. I just joined the PSD club, and have the 7.3 in a 2002 F-350. I really want the whirling almost chirping sound from my PSD!!

 

Straight pipes, loose the muffler and cat if you have one, and run the pipes out back, it will sound like a jet.

 

Thanks Fordman, fellow Hawkeye! Did you do it to yours? I only want the chirp from turbo, not the loudness like a jet.

 

All you pretty much hear is the turbo, nothin else really. No i have not done it to mine, but it is on the list. I have seen trucks with this done, and it sounds very nice.