Anybody have a 4" DownPipe ??? - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 10-22-2007, 04:23 PM Thread Starter
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Anybody have a 4" DownPipe ???

I have been told by an experienced tech that a 4" DownPipe from my OEM Turbo, will rub/touch some areas, ie. firewall etc.
I am going to install tommorrow AM on Wednesday Oct. 23, the 4" DownPipe and then branch out to a 5" straight Back (Off Road) edition Pipe. No Kittty and No Muffler.

The ? Is has anyone out there in cyberspace on the ORG. have a 4" downpipe and if so, ? Does it RUB against Anything ?? I am going to wrap my downpipe in Thermo Insulating Material in order to lower underhood engine compartment temps & increase the Scavenge effect that an insulated exhaust pipe has on exhaust discharge. I am hopefull that any rubbing/clearance issues will be omitted from creating any noise/clatter with the addition of the exhaust wrap. If the 4" downpipe does touch, I plan on fitting it correctly with the use of a 10 lb sledge Hammer Applied Scientifically only on the portions which create noise.
I will still have a 4" constant diameter downpipe and my exhaust wrap will cover my skillfully applied rubbinng corrections...LOL.
Anyway if anybody has any info/suggestions on a SMOOTH Trouble FREE Install.............let em' rip. Thanx Yall' Stay Safe -n- Go FORD!!!

06' F350 FX4, Mickey ATZ's, NOS+, 5" Xhaust, AFE Stg 2,Sneaky Pipe, SCT LWire w/180Hp Tune,CFM+LM Carbon Fiber, 4 AutoMeter Cobalt Gauges, MagHytek Trans & Diffs, FS-2500, LED Lights, T-rex Grill, Zoodad, Clifford Av Guard 5.1 Alarm w/ GPS. AND..2 much 2 List.
WON 1st Detail, & 1st Late Model Daily, @ 07' Truck Nat's, & Won 1st Best Modified @ 07' Ford Power Festival & Won 1st Modified,
& 2nd Highest HP @ SSS 07'
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post #2 of 11 Old 10-22-2007, 04:27 PM
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It is a tight fit but if done correctly it will be fine. I recomend have someone help on guy underneath one up top. That is my opinion for you. My 4" does not rub at all

Austin
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post #3 of 11 Old 10-22-2007, 05:48 PM
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I had no fitment issue's at all with mine. I did my whole exhaust in about an hour on my driveway.
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post #4 of 11 Old 10-22-2007, 05:56 PM
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Did you guys specifically order a 4" DP? If not then the standard setup is actually a 3.5" DP on the 4" system. It's pretty rare to see a 4" DP.
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post #5 of 11 Old 10-22-2007, 06:20 PM
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I got the true 4" and it was a pain in the a$$ to put in. Really tight fit but once it was up there, it was fine. It doesn't touch anything. Good luck 720. I also ditto the second set of hands. I didn't do it and it took me the longest just to get the downpipe in place. hehehe

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post #6 of 11 Old 10-22-2007, 07:23 PM
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I had some issues with mine. I had to bend the pinch welds for clearance. Extra hands would be great. I only had mine at the time so it took a while. I have a Hog 4".
Good luck!

Rick

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post #7 of 11 Old 10-22-2007, 07:40 PM
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Mine was a pain in the a$$ but it fits fine now that it is in.

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post #8 of 11 Old 10-22-2007, 07:44 PM
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post #9 of 11 Old 10-23-2007, 07:58 PM Thread Starter
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Talking Got her DID !

Got her did today, and man was it a tight FIT.




Thanx 4 all the input fella's, And YES I did order a True 4" Down Pipe
because it steps out to a 5" system from the downpipe all the way back to the Weld ON Tip. The OFF-ROAD Kit has no provision for a kittty delete pipe and it comes with a Muffler which I did not opt to have installed either.
I did however attempt to wrap the primary Down Pipe with Exhaust Thermal Wrap, done prior to fitting it up to the Turbo, and the Thermal Wrap actually
was torn upon install. (SO IT WAS VERY TIGHT).

I Did not opt for the 3.5" dwn pipe because i thought the Least amount of Step up would be the most efficient. The Pipe was welded and terminated at the end with a Monster 6" S/S Tip I had from my previous F350.
The truck (My PSD) is Much Much Louder NOW !
It seems previously my OEM Pipe was being run w/o a Kitty or Muffler and I had a S/S 4" Weld on Tip on Her. She (My PSD) sounded Wrappy where as now with this 4" DOWN and 5" STRAIGHT BACK, with the 6" Tip is A Much DEEPER Exhaust NOTE. It is SICK. And I Love The new Db"s I am able to Belch Out of this 6.0L PSD. Thanks for all the Input Guy's, I am very Pleased with the Outcome. Stay Safe and GO FORD.

06' F350 FX4, Mickey ATZ's, NOS+, 5" Xhaust, AFE Stg 2,Sneaky Pipe, SCT LWire w/180Hp Tune,CFM+LM Carbon Fiber, 4 AutoMeter Cobalt Gauges, MagHytek Trans & Diffs, FS-2500, LED Lights, T-rex Grill, Zoodad, Clifford Av Guard 5.1 Alarm w/ GPS. AND..2 much 2 List.
WON 1st Detail, & 1st Late Model Daily, @ 07' Truck Nat's, & Won 1st Best Modified @ 07' Ford Power Festival & Won 1st Modified,
& 2nd Highest HP @ SSS 07'
Thanks 2 www.outlawdieselmiami.com
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post #10 of 11 Old 10-24-2007, 09:02 PM
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I have the 3.5 inch DP and it is even a pain to put in. I guess mine shifted while tightening clamps and its right next to the fire wall.. Like 1mm. 40k miles later, still next to firewall but no problems...
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