I may have read of other Vanagon wrenchers prefer copper nuts and washers. or I heard it from a guy at my mechanic's shop sharing the owner experience. IDK about copper bolts - I would expect stainless steel but IDK about heat exchange/transfer between copper and ss.

--- On Mon, 11/28/11, Gregg Carlen <gregg.carlen@GMAIL.COM> wrote:

> From: Gregg Carlen <gregg.carlen@GMAIL.COM>
> Subject: Nuts and bolts to use on exhaust
> To: vanagon@GERRY.VANAGON.COM
> Date: Monday, November 28, 2011, 6:06 PM
> So, while doing the head on my van
> (1990 2WD Westy), I was able to 'safely'
> remove the header bolts and nuts between the exhaust and
> head. Of course,
> these are one-time use hardware. Aside from just using 12
> and 13mm nuts and
> bolts, can anyone recommend good quality hardware that will
> stand the test
> of time to use on the exhaust system so the next time I
> have to remove them
> for whatever reason, that I have a better chance of safe
> removal?
>
> Thanks,
> Gregg
>