Which cold air intake is better for turbo whistle and performance? - Ford Powerstroke Diesel Forum
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Old 06-03-2012, 09:07 AM
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Which cold air intake is better for turbo whistle and performance?

Howdy diesel lovers not to big a deal but I wanted yalls opinions...I have an 05 f-350 with a 4in from the turbo back exhaust dumped over the rear axle and right now I have an airraid intake right now but i need that piece of junk outta there! Just lookin for performance and turbo whistle thanks guys!
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Old 06-03-2012, 09:22 AM
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You'll gain minimal performance with any aftermarket CAI, and the whistle comes from the turbine side (exhaust side) of the turbo. You want more whistle, get an '03 turbo.
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Old 06-03-2012, 01:04 PM
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He's right. I have a K&N FIPK on mine, but it's a early 04' and the whistle is nearly deafening. I love it.
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Old 06-03-2012, 01:31 PM
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For performance and whistle, you would do best with an S&B intake, and freeing up the exhaust with a 4" turbo back system, deleting both the cat and muffler. The most cost effective, would be simply straight-piping your stock system, and pick up a 3.5" downpipe, and the S&B intake mentioned above.

Reason I say the S&B, its the only one I've read about on these forums that still filters enough to keep the dirt and junk out of your turbo. For my build, filtration is everything so I keep the stock airbox/filter.

If you want crazy whistle, you get either an '03 turbo with pedestal and refit it to yours, or you go with a Powermax which sounds a lot like one.
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Old 06-03-2012, 05:55 PM
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Want it really loud, just remove up pipe and.down pipe and run open exhaust side Turbo. Ha the whistling gets old sometimes tho.
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