3.5" mbrp downpipe question - Ford Powerstroke Diesel Forum

 
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post #1 of 5 Old 11-12-2011, 05:50 PM Thread Starter
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3.5" mbrp downpipe question

MBRP 03-06 Ford 6.0L Powerstroke Stainless Downpipe DS6206


Is the outlet on this downpipe 4"? Will I be able to weld it to the existing 4" pipe that my current 4" downpipe is welded to? If not what does the exhaust guy have to do to get the 3.5" downpipe to mate to the 4" pipe. Just so I have an idea of what needs to be done before I go in there. Thanks

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #2 of 5 Old 11-12-2011, 07:46 PM
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It steps up to 4" after it turns under the truck.
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post #3 of 5 Old 11-13-2011, 07:11 PM Thread Starter
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Really? Some guy said otherwise on psn. here is a bump anyways.

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #4 of 5 Old 11-14-2011, 01:55 AM
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Quote:
Originally Posted by darsey715 View Post
Really? Some guy said otherwise on psn. here is a bump anyways.
If I'm wrong get a 4" to 3.5" reducer and weld it to the downpipe. No big deal. But since MBRP make 4" and 5" turbo back systems I'll lay money that they include the step up to connect it all wouldn't you think.
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post #5 of 5 Old 11-20-2011, 07:07 PM
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actually i have a question about downpipes in general. For our trucks are aftermarket downpipes really that much if any better then oem, im not sure of what size the oem is off hand but i have an oem dp to mbrp 4 inch catback and im running catless. i just wanted to know if its a major difference or if i should spend my money elsewhere. thanks
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