> > I have run a couple of these on the 81 Westy I recently sold.  The first
> > was an EMPI dual quietpack design.  Had sort of a mellow throaty sound.
> > Noticeable, but not obnoxious..
> > However this particular system was VERY cheaply made
>
> *(Note: This post relates to aircooled Vanagons only)*
>
> This has been my experience as well.  Most of the extractor type systems,
> such as the Bugpacks, Empi's, and Thunderbirds, are of relatively thin metal
> and in many cases are crimped rather than welded on the ends.

Yes, I've gone through several various brands on my '72 with poor durability
regardless of brand.  However the last one, a Bugpack, I bought from Rocky Mtn
Motorworks which gives lifetime guarantees on all their parts.  I expect it too
will rust out and they will be the first one's I'll call when it does.
Mark