stock downpipe expansion? - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 04-01-2009, 08:47 AM Thread Starter
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stock downpipe expansion?

MY truck my sig. on the stock downpipe under the truck theres about a foot of it thats an inch bigger the the rest like an expansion chamber or something, its all heat wrapped, so i cant tell, anyone know???

03 F350 Lariat CC LB 4x4,
straight Pipe 4" exhaust 6" tip
3" front lift
5100's bilstiens
high idle mod
Sct Gearhead tuned,
EGR deleted
trans,fp, boost, egt, ect, eot gauges
vgt switch
2low Switch
315/75/16 baja claw
Custom trac bars
coolent filter
ccv mod
arp studs by me
afe stg 2
fuel bb mod
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post #2 of 3 Old 04-01-2009, 12:53 PM Fanatic
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My 03 had I believe it was called a resignator in the downpipe. It helps take out some of the drone and whistle the 03 turbo creates. I know when I removed my exhaust and put on aftermarket the whistle was crazy loud but you will get use to it.

2006 F250 Lariat CC 4x4
4 inch MBRP Exhaust
Innovative Tuned SCT
Street Race Lite by Gearhead Automotive
Banjo Bolt Mod.
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post #3 of 3 Old 04-01-2009, 03:21 PM
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That's correct. All it is for is to cut down on some of the whistle that the 03 turbos make.

2005 F-250 CC/SB 4x4 medium wedgewood blue

5" lift, 5" Donahoe rear springs, 35x13.50 Extreme A/T's, 18x10 Ultra Predator wheels, 4.30 gears, Banks 4" exhaust, Airraid intake, SCT from Innovative, ARP headstuds, Bulletproof ficm, Scangauge II, Randy Ellis Design lightbar, Street Scene flares, Harpoon mod, Zoodad mod, LED 2010 taillights, dual color LED front turn signals, Pioneer avic-D3 with ipod and backup cams
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