I have completed my exhaust flange for the Russian design square tube. Not
being an exhaust fabricating professional, I would appreciate some advice on
the fit of the tubes to the flange.

Right now, my 2' sq. tubes will achieve a friction fit, that is, they will
slide in with a little wiggling and a couple gentle taps with a hammer. Is
this too tight? About right?

Thanks, C. Smith

I am no welder but that sounds OK to me.

Paul Lamar

C Smith,

The fit does not have to be that close.  More important is to leave
about 1/8" from the engine side of the flange to the tube and have
the weld done on this inside seam,  I remember (from somewhere) that
welds done on the outside seem to propagate cracks in the tube. This
procedure will also lessen warping of the flange.
Dan F



Thanks Dan. That's the kind of info I'm after.
C.Smith