Join Date: Aug 2011
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I have an FTE resonator which come in two different sizes, a 12" and a 30". I got the 30" and it takes the drone and turbo whistle out quite a bit. More so the drone but some turbo whistle to. I don't have a 03 turbo so I can't give you a direct reference on the outcome. I think mufflers seem to do more work then the resonators in my opinnion. Another option you could do but is more costly is a new turbo from MAD turbo werks. I think he can make a turbo that has less whistle then your 03 yet makes more power then what you got.
If your mind is on the exhaust work though try giving FTE a call, they have great customer service and speacialize in muffler and resonator work
2006 F250 King Ranch 6.0L - 2.5" Leveling Kit w/ 4" rear blocks, ARP Studs, EGR Delete, 4" TB MBPR Straight Exhaust, SCT Tuner w/ Quick Tricks, Innovative, and Gearhead tuning, Blue Spring Upgrade, Dieselsite Coolant Filter, ScanGuage II, Dyno-Tune EGT guage, High Idle, Custom Wood Steering Wheel, PAC Aux Input, Ipad Mount, 5% Tint all around w/ 50% Windsheild Tint