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Exaust Question

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Old May 20, 2008 | 08:49 PM
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85_Ford_6.9L_4x4's Avatar
85_Ford_6.9L_4x4
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From: Oak harbor Wa.
Exaust Question
Hey Ya'll, long time no see...LOL Been on a deployment to Japan, GOd I miss my truck...LOL anyways, does anybody know what the stock exaust diamater is on an '85 6.9L??? I'm looking at getting a stack kit on order so it'll be at the house, or close to it when I get back in a couple of weeks, but I need to know what reducer I'd need and cant remember off the top of my head.
 
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Old May 20, 2008 | 09:10 PM
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Im pretty sure its 2.5"
 
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Old May 20, 2008 | 10:00 PM
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The stock exhaust is 2.25" ID pipe.

And that is the largest pipe that will fit into the manifold clamps if you have an exhaust made.
 
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Old May 20, 2008 | 11:46 PM
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Sorry about the 2.5" I went and measured a piece I had and it indeed 2.25"
 
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