stock downpie size,

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Jan 25, 2012 | 11:17 AM

99stackedpowerstroke

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Diesel Wrench

Joined: Dec 2009

Posts: 687

Likes: 16

From: southeast Iowa

stock downpie size,

I'm about to put exhaust on a truck for a friend, but he's wanting to leave stock dowmpipe, so he ordered a cat back exhaust, and my question is, what's the stock size at the cat?

Jan 25, 2012 | 01:50 PM

1st Diesel

Diesel Enthusiast

Joined: Jan 2012

Posts: 178

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From: Jackson, MI

should be 3 1/2 inch. pretty sure Ford used a 3'' downpipe then the rest of the exhaust was 3 1/2

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