Bye bye, JBAs.....
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Joined: Jan 2009
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If you constantly get any header wet it's not going to last. Ebay headers are no different. Before I installed them, the only difference noted was the crazy dome looking thing in the collector of the JBAs, other than that, material and construction is about the same.
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Joined: May 2007
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They came that way right out of the box.
They have some surface rust now, just like you would expect from a decent grade of stainless (better than the stock exhaust system that's "stainless"), but that's after almost 2 years on the truck, and they salt the roads around here a lot in the winter.
They still do have some shine left though...
They have some surface rust now, just like you would expect from a decent grade of stainless (better than the stock exhaust system that's "stainless"), but that's after almost 2 years on the truck, and they salt the roads around here a lot in the winter.
They still do have some shine left though...
The actual exhaust pipe from the manifold back is also a ferritic stainless 409 I think, that's why you dont need to replace the exhaust on your cars every 10 years like you would if you had a carbon steel exhaust. Most people think that Stainless steel has to be shiny and never rust.
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Joined: Jul 2002
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From: Long Island USA
If anything, PM TeamMudd to contribute to this thread if possible, instead of holding off-forum discussions about anything that we as a community might find interesting.
I've beaten my truck up pretty good. I've jerked and pulled stumps, drag-raced, full load for extended periods of time, you name it.
The ebays are still holding up. As long as you have a good exhaust system, and it's not hanging TOO loose, or TOO tight, and the y-pipe meets the headers without force, I don't see any reason they wouldn't hold up.
But then, that goes for the JBAs too
I've beaten my truck up pretty good. I've jerked and pulled stumps, drag-raced, full load for extended periods of time, you name it.
The ebays are still holding up. As long as you have a good exhaust system, and it's not hanging TOO loose, or TOO tight, and the y-pipe meets the headers without force, I don't see any reason they wouldn't hold up.
But then, that goes for the JBAs too
FTE Leadership Emeritus
Joined: Jul 2002
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From: Long Island USA
I know ... that "ferritic" stainless probably also holds a magnet too, doesn't it?
Hotshot
Joined: Mar 2007
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From: Pa
400 series is pretty magnetic and also cheaper than 300 series. 300 series stainless is mostly iron just like the 400 series but the 300 has a higher content of nickel, chromium and other alloys which knocks down the magnetic properties for the most part while greatly increasing corrosion resistanse. 400 series is also able to be hardened and then should be passivated to make it resistant to corrosion. Main reason 400 series is used is to keep the cost down. Nickel is mucho expensive, more nickel and other alloys equals more money.
http://www.mcmaster.com/#8984kac/=zinf9
http://www.mcmaster.com/#8984kac/=zinf9
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400 series is pretty magnetic and also cheaper than 300 series. 300 series stainless is mostly iron just like the 400 series but the 300 has a higher content of nickel, chromium and other alloys which knocks down the magnetic properties for the most part while greatly increasing corrosion resistanse. 400 series is also able to be hardened and then should be passivated to make it resistant to corrosion. Main reason 400 series is used is to keep the cost down. Nickel is mucho expensive, more nickel and other alloys equals more money.
McMaster-Carr
McMaster-Carr
as a rule of thumb, It is never hardened with carbon like steel if it is then it forms Chromium carbides, and if to much carbon is present then it will become a martensitic stainless.
300= austenitic and is non magnetic, unless it is work hardened then it becomes magnetic. But grade 329 is a Duplex stainless so it si authentic and ferritic at the same time, its split 50/50 to cut down on chloride stress corrosion cracking.
400= this scale is strange because depending on the grade it is either ferritic or martensitic stainless, they are both magnetic. But very different.
BTW: DFK, you know alot about metals, you going to school for it?
Hotshot
Joined: Mar 2007
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From: Pa
I'm a machinist. I cut, form and weld metals (stainless included) on a daily basis. But yeah I did go to school for machining and metalurgy was a required class. I learned a lot on my own by reading also.
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