4" exhaust on OBS??? - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 07-11-2008, 06:46 AM Thread Starter
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Question 4" exhaust on OBS???

Is 4" an option..my buddy said he can only fit 3" on his 96 and the exhaust dealer im talking to says run 4"?!?!? will 4" fit on a 97?
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post #2 of 9 Old 07-11-2008, 06:59 AM
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yea
you can fit a 5 in. if you wanted
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post #3 of 9 Old 07-11-2008, 07:05 AM
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On those original PSD's, the down pipe was oval shaped because of the limited space between the block and the back of the engine bay. You can definately put a 4" exhaust in there but you've gotta bend some metal.

Bobby Reider
Frisco, Texas
2003 F-250 Crew Cab Lariat 4X4 6.0
Built: February '03
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post #4 of 9 Old 07-11-2008, 07:06 AM
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He's probably talking about the down pipe. The down pipe can start out at 3", and then it goes to 4" the rest of the way.
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post #5 of 9 Old 07-11-2008, 08:23 AM Thread Starter
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I know my limit is 3" on the DP but im asking about the pipe from the DP to the tip...
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post #6 of 9 Old 07-11-2008, 08:27 AM
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Yes you can fit 4" without a problem

2010 f250
ext. cab long bed
4x4 6 speed
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post #7 of 9 Old 07-11-2008, 08:28 AM
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5 in. i think is the biggest you can buy
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post #8 of 9 Old 07-11-2008, 08:33 AM
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4" is what I've got now

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post #9 of 9 Old 07-11-2008, 09:15 AM
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same here

Jared


97 F-350
Reg cab long bed
TW Chip
Intercooled
3" Down pipe
4" SS Magnaflow
DIY Intake
Boost, Pyrometer, Trans temp gauges
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