6637 intake tube - Ford Powerstroke Diesel Forum
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Old 04-21-2012, 05:29 PM
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6637 intake tube

I can't find any 4" exhaust tubing what else can you use
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Old 04-22-2012, 04:37 AM
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YOu can use a PVC plumbing 45 degree elbow. 3" or 4" depending on thickness. Some people have used 4" Street elbows. i had to use a 3" flanged elbow to make it work. Just go to a local harware store and match up the size as close as you can. Had to use a little black tape to get a better seal.
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Old 04-22-2012, 04:54 AM
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I bought a 4" Aluminum 45* off ebay and cut it down to length.
http://www.ebay.com/itm/4-45-Deg-Pol...item1c2483d603
Just one I found.
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Old 04-22-2012, 01:37 PM
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I had Stainless Steel Headers in Fargo,ND make mine. Took a pc of 45 degree mandrel bent 4 inch and cut the straight end off one side and welded it to the other. Cost me $25 and looks killer. They are nice people. They can make pretty much anything you want.

Stainlessheaders.com
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Old 04-22-2012, 01:43 PM
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just buy an exhaust, its a good investment anyway
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Old 04-23-2012, 12:53 AM
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Could large conduit work? I just did the same 6637 mod and would like to see the same what the original poster is looking for. I'd like to see a cleaner look than utilizing the stock intake. By the way this is a wonderful site.
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Old 04-23-2012, 06:12 AM
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You don't have a single muffler shop anywhere near? They'd have the pipe.
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Old 04-23-2012, 07:35 AM
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i am doing the same thing and considering the PVC route myself
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Old 04-23-2012, 07:41 AM
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I used 4" PVC, 45*
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Old 04-23-2012, 10:58 PM
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Kegs has 4" pipe for $23


Wishin I was fishin.
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