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I have a 2015 6.7 deleted with 5" exhaust, s & b cold air intake and no egr running sct x4 tune. Does anyone know what i can do to get the turbo whistle louder? Its super quiet compared to older f250's
 

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Bigger intake, besides that you will have to get into the turbo itself being you have already done the exhaust. I doubt there are any real tuning options.
 

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I'm fully deleted with a CAI and I do that really hear the turbo from the engine. It is definitely loud at the exhaust though. Even at shutdown it sounds like a jet

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Whistle comes off the turbine side, so you need to modify everything after that to get more whistle. Buying a modded turbo will get you a Pmax whistle when running straight piped.
 

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Whistle comes off the turbine side, so you need to modify everything after that to get more whistle. Buying a modded turbo will get you a Pmax whistle when running straight piped.
Actually, it's both sides. It's just easier to get the whistle from the exhaust side because the compressor side has a filter, 200 ft of intake (well, it looks like it), an intercooler and so on blocking the compressor whine. With the turbine side, install a turbo-back exhaust with a Magnaflow straight-through muffler and it'll whistle nicely - at least as much as a VGT type turbo can.
 

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I've been told it is harder to get the 2015 and newer to whistle because of different turbo than the earlier models. Any truth to? I didn't realize they changed the turbo from 2014 to 2015.
 
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