Downpipe Question - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 12-15-2011, 12:35 PM Thread Starter
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Downpipe Question

I've only had my truck about a month now and I'm wanting to do a cat delete. The truck has MBRP 4" exhaust run from the cat back, but I have a suspicion that it also has the MBRP downpipe. If that were true I'd just need a cat delete pipe from MBRP...anyone know how I can if the downpipe is factory or the MBRP one?

Also, if I find it's not, anyone know a cat delete pipe that will bolt up to the stock downpipe?

Brian - 2005 F250 CC SB King Ranch
35" Nitto's 20" American Racing Wheels
SCT tuned by Vivian, BPD EGR Delete, ARP Head Studs, OEM Gaskets, 4" MBRP Turbo Back Exhaust, Edge Insight, Zoodad Mod., Fog Light Mod., New Y-pipe, 08 tail lights, 08 Rear Diff Cover, Sinister coolant filter, Zerex ELC, Blue Spring

Future mods:
Guages
08 Rear Bumper and Tailgate
Possibly 08 Mirrors? Can't decide...
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post #2 of 4 Old 12-15-2011, 12:41 PM
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The factory down pipe is 3.25" if that helps.

Scott Muesse
Hubbard Texas (Near Waco)
1999 F-350 7.3 4x4 CCLB
2015 Palomino Puma 30-RKSS
'73 F-100 Restoration Project
'05 ClubCar gas golf cart
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post #3 of 4 Old 12-15-2011, 12:50 PM Thread Starter
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Ok thanks I'll check into that...I've heard everywhere from 3 to 3.5 on the factory downpipe

Brian - 2005 F250 CC SB King Ranch
35" Nitto's 20" American Racing Wheels
SCT tuned by Vivian, BPD EGR Delete, ARP Head Studs, OEM Gaskets, 4" MBRP Turbo Back Exhaust, Edge Insight, Zoodad Mod., Fog Light Mod., New Y-pipe, 08 tail lights, 08 Rear Diff Cover, Sinister coolant filter, Zerex ELC, Blue Spring

Future mods:
Guages
08 Rear Bumper and Tailgate
Possibly 08 Mirrors? Can't decide...
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post #4 of 4 Old 12-15-2011, 12:54 PM
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Same here, well not the 3" but 3.25 and 3.5. Mine is stock and you can tell that the downpipe is a little smaller than the rest of it. It starts with 3.5 where the DP bolts to where the cat used to be. I had my cat and muff removed Monday so I looked at it then because I am considering buying a 3.5 downpipe to match the rest of the exhaust.

Scott Muesse
Hubbard Texas (Near Waco)
1999 F-350 7.3 4x4 CCLB
2015 Palomino Puma 30-RKSS
'73 F-100 Restoration Project
'05 ClubCar gas golf cart
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cat delete , downpipe , mbrp

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