Underslung Exhaust Pipe

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bob in CT
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Re: Underslung Exhaust Pipe

Postby bob in CT » Wed Jan 28, 2015 5:13 pm

No idea where IH gets their material. You can buy tubing here, however. This looks close, stock number T2114065
http://www.metalsdepot.com/catalog_cart_view.php?msg=

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Re: Underslung Exhaust Pipe

Postby Jim Becker » Wed Jan 28, 2015 5:32 pm

Based on the existence of products like this:
http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Exhaust-Flexible-Tubing-Pipe-Galvanized-Steel-NAPA-Exhaust/_/R-EXT46972_0399321888
I assume galvanized is OK for exhaust systems. Just don't get temperatures up near the range where metals melt, which is where you end up when welding/soldering/brazing.

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Re: Underslung Exhaust Pipe

Postby The Riot » Wed Jan 28, 2015 9:11 pm

Thanks Gents.
Bob, that Metals Depot site is exactly what I was looking for. I was unsure about the wall thickness, but I would agree it's probably the .065. Also, I'm undecided and will take another close look at the O.D., I'm looking at the 1-1/8 and the one you suggested 1-1/4".

I'll keep everyone posted on the results.

Regards,
The Riot

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bob in CT
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Re: Underslung Exhaust Pipe

Postby bob in CT » Wed Jan 28, 2015 10:50 pm

I put a vernier on a rusty pipe that came off my '77, but it is hard to get a decent measurement over rust. How would you form the trumpet for the manifold connection?
I bought a new pipe for my 77 and ended up having it coated. Turned out to be a pretty expensive pipe.

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Re: Underslung Exhaust Pipe

Postby aelzner71 » Thu Jan 29, 2015 1:35 pm

I have fabrication drawings and parts/price list for a Pro-Tools bender if anyone is interested. A friend fabricated one for a couple hundred bucks including the die and follower ordered from Pro-Tools. The file is pdf and about 2MB, so if you are interested send me your email address via PM. If the admins think it would be good to host in the tools/machinery forum, please advise.

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Re: Underslung Exhaust Pipe

Postby The Riot » Fri Jan 30, 2015 10:09 am

On forming the Trumpet I'm open for suggestions, but what I'm thinking is heating up the pipe end cherry red and either trying to press form it, using the flared end of the 90 or maybe just bumping the fitting into the pipe with a hammer until I have the shape right and a good fit.

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bob in CT
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Re: Underslung Exhaust Pipe

Postby bob in CT » Fri Jan 30, 2015 10:20 am

The Riot wrote:On forming the Trumpet I'm open for suggestions, but what I'm thinking is heating up the pipe end cherry red and either trying to press form it, using the flared end of the 90 or maybe just bumping the fitting into the pipe with a hammer until I have the shape right and a good fit.

I understand the challenge, but it sure is a lot easier to buy the right pipe. :wink:

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Re: Underslung Exhaust Pipe

Postby Barnyard » Fri Jan 30, 2015 10:32 am

bob in CT wrote:I understand the challenge, but it sure is a lot easier to buy the right pipe.

I agree with Bob! By the time you buy the material, pay to ship it and then spend time fabricating it, some of which may be hit or miss, you would be better off spending the money on a sure thing.
It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.
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Re: Underslung Exhaust Pipe

Postby The Riot » Fri Jan 30, 2015 1:17 pm

Thanks guys for a little dose of reality and common sense, getting the right pipe is best.

Question: I know for a fact that I have the wrong exhaust manifold and had to use the reducer which caused my pipe not to line up, Do you think that if I not go with the "other" pipe, that is the one for this different manifold that will solve the problem?

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bob in CT
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Re: Underslung Exhaust Pipe

Postby bob in CT » Fri Jan 30, 2015 2:05 pm

The newer pipe works on my '77 that has the newer manifold with the reducer and the elbow. I have a rusty one I am keeping as a service spare that you could try for fitment, but with shipping costs I would call TM and ask them if they would take it back if it did not work out for you in a dry fit-up. I think that would be the lowest risk and cost option as you would need to pay for one-way shipping if it worked out and 3-way shipping if you wanted to try and return one before committing to buy.


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