6.9 Straight pipe upgrade. - Ford Powerstroke Diesel Forum

6.9L IDI Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

 
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post #1 of 4 Old 11-21-2008, 07:33 PM Thread Starter
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6.9 Straight pipe upgrade.

Hello there,

Just bought a 85 F250 6.9 with low miles, Looking to start with upgrading the exhaust. Can I use dual 3.5 inch straight pipes on the truck? (No muffler) Or will this wake the neighbors up at 5am? I want a really good sound. Would there be any obstructions by using the twin pipes? Such as fuel tank or spare tire.

Thanks,
Justin
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post #2 of 4 Old 11-22-2008, 10:44 AM
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dual 3.5in. pipes would work just fine. wouldn't go any smaller than 3.5" though.

not sure about any obstructions, you'll just have to see what you think

it should sound ok, check youtube for some videos

Typical cummins owner.

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post #3 of 4 Old 11-22-2008, 10:45 AM
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youll wake the neighbors but who cares. hows the truck look?

1999 Ford F250
6SP
Ext Cab
4x4
Pullin clutch
EDGE EVOULOTION
(STROKEIT)
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post #4 of 4 Old 12-02-2008, 06:57 PM
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if your 6.9 is anything like mine and all the others i've heard it a loud chatery neighbor waking machine anyway, thought my 6.9 is very quite running on veggie oil.
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