Need help new MBRP 4" downpipe doesn't fit what can I do!!!! - Diesel Forum - TheDieselStop.com
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Power Strokes 1994-1997 Upgrades and Aftermarket Upgrading or adding OEM or aftermarket equipment to your 1994-1997 Ford F-Series with Power Stroke engine.

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Old 11-28-2012, 11:47 AM   #1 (permalink)
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Need help new MBRP 4" downpipe doesn't fit what can I do!!!!

Hello guys! Well yesterday I finally got my MBRP 4in downpipe so I cut the old one off to find out that my new one is way to big and just slides over the turbo is there an easy way to make this 4" DP work?!
Thanks!
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Old 11-28-2012, 04:41 PM   #2 (permalink)
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Don't think so. Turbo is 3" and that is all you are going to get to fit above the firewall without some serious body work. Even the 3" requires a good deal of "massaging" of the pinch seam to fit. I do recall reading about a guy who put a 5" DP on. He used a section from a 15 gallon grease bucket to make a tunnel for the DP in the cab floor. Anything is possible.
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Old 11-28-2012, 06:50 PM   #3 (permalink)
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Did you get a SuperDuty downpipe? All of the OBS DPs will start at 3" as mentioned. Guys that have used 4" DP's have either modified the firewall (vice just pushing over the pinchweld on the firewall/floor joint) or used a body lift. Cheers!
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Old 11-28-2012, 07:11 PM   #4 (permalink)
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I already got it to fit don't. Trust me was not fun! I just need to find a flange adapter to make it fit the turbo!
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Old 11-28-2012, 07:15 PM   #5 (permalink)
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I doubt that you will find a adapter to the turbo. Those that have done the 4" down pipe have made their own out of the old down pipe and a welder.
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Old 11-28-2012, 07:43 PM   #6 (permalink)
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I just found a adaptor flang at a local store but it was $$$$70 but is worth it. so when I get home my 4in downpipe will be done!
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