Copper flanged exhaust nuts, DO NOT USE THEM Options

[VaccaRabite]

I have never pulled an exhaust stud before while doing pipes. This evening I’m 4 for 4. These copper flanged nuts locked on the studs and there was 100% no getting them off without the studs coming with them.

Going back to using just regular nuts with 12mm flats. So much for trying to get the “right” part.

Edit to add details:
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The nuts in question are commonly available and sold as exhaust nuts. I got mine from Auto Atlanta - but many places sell them. The have a copper color to them and the bore is slightly oval. The are designed to lock on to the stud - which I did not know at the time. They go on tight and you can not remove them without pulling the stud.

There are flanged nuts that work fine.

Kinda furious with myself right now.

Continuing to live life as an object lesson for others…

Zach

[ClayPerrine]

There is an Aluminized Mercedes Benz flanged exhaust manifold nut that works great. They stay tight, but don't seize to the stud, and the flange means you can get a socket on them.

I don't have the part number but @partsguy22 will know.


Clay

[porschetub]

There is an Aluminized Mercedes Benz flanged exhaust manifold nut that works great. They stay tight, but don't seize to the stud, and the flange means you can get a socket on them.

I don't have the part number but @partsguy22 will know.


Clay

(IMG:style_emoticons/default/agree.gif) used the BMW version of these on my "6" headers ,really good and don't loosen up , got them from Pelican for chump change each,seem to remember brass and steel don't play well together due to constant heat cycling.
After extracting 4 bad head exhaust studs I wasn't prepared to use the wrong nuts..end of story.