Not that this was being suggested as an alternative, but just in case
anyone is tempted..... :^)

I ain't no expert, but I recall asking at a metal fabricating shop
about welding EMT. They said yes, one could weld it (in my case using
a MIG) BUT, the EMT surface should be prepared by grinding them down a
little at least 1" from end(s). Even then I wouldn't be confident
doing it as I'm not certain of the metal content or depth of
galvanized material.

My understanding is that welding galvanized is to be avoided anyway.
(nasty fumes).

Neil.

On Tue, Oct 14, 2008 at 12:59 PM, Scott Daniel - Turbovans
<scottdaniel@turbovans.com> wrote:

> a factor to consider ............a hollow can for a cat doesn't flow as well
> as  a good cat, or a straight pipe in place of a cat.
> don't tell anyone I said this ............but a slick thing to do is weld a
> piece of straight pipe into a hollow cat.   Best flow, least restriction.
> There's on size of EMT electrical conduit that fits perfectly - just weld it
> inside at both ends.  I've never done this of course, just heard about it.