looking for a 3 1/2" down pipe - Ford Powerstroke Diesel Forum

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post #1 of 5 Old 03-07-2008, 05:05 PM Thread Starter
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looking for a 3 1/2" down pipe

After purchasing a fifth wheel RV (31' outback) and towing it 1300km home I need to quiet my truck down its way too loud when pulling hard so what I want to do is put a stock size down pipe but mandrel bent with out the dimpling and reinstall the cat and turn the 4" turbo back in to a cat back So my question is where can I get a pipe like this or is there such a thing to be had and what else whould I need?
Also this was the first load I hauled with the 6.0 I must say it pulls awesome I'm very impressed I went through the Rocky's from BC to Alberta and no hill could put it under 55mph even with 35"s however the fuel millage went out the window

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post #2 of 5 Old 03-09-2008, 01:44 AM
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The OEM DP is more like 3" and sounds like you will need to swap out with someone looking to upgrade. I'll help fund the swap if you need to sell off the MBRP downpipe.

Maybe some header wrap around the DP and reinstalling the cat would be a better fix?


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post #3 of 5 Old 03-09-2008, 07:32 AM Thread Starter
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Thats a thought too most of the noise is the echo against the trailer I did some searching and I can get a 3 1/2 dp thats a direct factory replacement fit it think I'll install one of those with the cat going into the mbrp duals

2004 crew cab lariat
4" MBRP duals turbo back no kitty
AFE stage 1 intake
Cloud rider grill inserts
4" pro-comp lift
315 BFG Mud Terrain
16x8 Dick Cepek DC-1 Polished
Wabastco coolant heater
Garmin NUVI 250 GPS
Reese 16k slider fifth wheel ,Prodigy brake controller
SCT Xcal3 fr Innovative
Tow brake,Econo,Street,Extreme street
Truspeed, Quadzilla recon monitor
66mm VGT
Liberator EGR delete
Viper remote start\alarm
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post #4 of 5 Old 03-09-2008, 07:46 AM
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if u put your cat in it will make a huge difference


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post #5 of 5 Old 03-09-2008, 08:21 AM Thread Starter
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I think that will do it its a shame i love the sound just bombing around town

2004 crew cab lariat
4" MBRP duals turbo back no kitty
AFE stage 1 intake
Cloud rider grill inserts
4" pro-comp lift
315 BFG Mud Terrain
16x8 Dick Cepek DC-1 Polished
Wabastco coolant heater
Garmin NUVI 250 GPS
Reese 16k slider fifth wheel ,Prodigy brake controller
SCT Xcal3 fr Innovative
Tow brake,Econo,Street,Extreme street
Truspeed, Quadzilla recon monitor
66mm VGT
Liberator EGR delete
Viper remote start\alarm
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