Down Pipe ??? - Ford Powerstroke Diesel Forum
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  #1  
Old 08-30-2012, 06:20 AM
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Down Pipe ???

I am running a 5" down pipe back DPF Delte Exhaust system. I am considering replacing the factory down pipe because of the pictures I have seen it seem pretty constrictive.

Is it OK to run it with the 5" down pipe back exhaust or am I wasting the 5" exhaust due to the constrictive factory down pipe??

Would I see gains in air flow, mpg, power if I replace the factory downpipe or am I OK to run it like it is??
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Old 08-30-2012, 06:24 AM
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I originally had a 5" DP back exhaust and went through your same thought process. I ended up swapping out the stock DP with a 4" DP. There were no power gains and no gains in MPG's, but EGT's dropped some. You can drop your EGT's at WOT/towing by doing a 4" DP, Cold side Pipe, and a high flow intake elbow/EGR delete.
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Old 08-30-2012, 06:28 AM
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I already have the AFE CAI, H&S Mini Maxx, EGR Delte with High Flow Elbow, and the MBRP Passenger Side IC Pipe.

Just wondering if it is worth the headache to change out that down pipe.
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Old 08-30-2012, 06:34 AM
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The downpipe is worth it in my eyes. It only took me about 45 min to swap out my stocker with an AFE 4" DP. Pretty easy if you have a second set of hands standing up top to help wiggle the stocker out after you cut it.
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Old 08-30-2012, 06:35 AM
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Are there any write-ups on the steps involved? (where to cut, what to use, etc...)

I may try to do this.
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Old 08-30-2012, 06:42 AM
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There may be but I havent seen one. What I did was Disconnect the DP from the turbo (13MM socket if I remember but may have been a 12mm), disconnect the DP from the stock exhaust. Wiggle the stock DP out the bottom as far as you can get it to go. Take a sawzall and cut the stock DP as high up as you can. Once you have that done you will be able to rotate the stock DP out the bottom of the truck. Slide the long first half of the new 4" DP up into position and fasten it to the turbo loosely. Install the second half of the DP into the bottom of the first half. Position all of the parts so they dont rub on the frame and tighten from the bottom going up.
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Old 08-30-2012, 06:50 AM
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OK. Sounds easy enough! Thanks!!!
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Old 08-30-2012, 06:55 AM
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Your welcome man
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Old 09-12-2012, 12:49 PM
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So on the back of the turbo, is it only that one band clamp thing holding the down pipe onto the turbo?

Do I reuse that clamp to attache the new downpipe?
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Old 09-12-2012, 02:31 PM
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Yes and yes.


Sent with my mind using ESP.
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