Join Date: Oct 2009
Location: Durand, IL
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I believe that a 3" downpipe is only available, don't hold me to it. 3" isn't too bad to put in, just did one Saturday, 4" I think would be a nightmare. If you want turbo whistle put on a 6637 or equivelant and 5" straight piped exhaust, that is how mine is set up and I really enjoy it, nice deep tone and you can hear the turbo. That would mean getting new exhaust, which wouldn't really be worth imo, but it does give a nice whistle. I can't comment on whether 4" whistles good because I have only heard 4" with a resonator.
97' F-250HD. ECLB. 66,000 miles. 7.3. E40D. 6637 Filter. 5" Exhaust. Deleted EBPV. CCV mod. 45 gal. Transferflow Rear Tank. Stock for now. Dana 60 in the works.
97' F-250HD. ECLB. 18x,xxx miles. 7.3. E40D. 6637 Filter. 4" Exhaust. TW Tunes. Work Truck.
97' F-250HD. ECLB. 150,000 miles. 7.3. E40D. 4" Exhaust. Work Truck.
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