Bill,

I purchased a pair of 45 degree SS joints.  We held them about where the
bend would be  exiting the cowl and cut off the existing straight pipes
about 4-5 inches.  After welding the 45's  on we looked at an extended
line created by the lower cowl and made a guess.  Without looking at it
today, I recall the leading edge of the cut was about 1 inch below the
extended lower cowl line.  The angle was 25 -30 degrees to the straight
pipes.  This did put the trailing edge slightly above the extended lower
cowl line.  On my plane that puts the trailing edge about 3 inches below
the belly of the plane.  I was delighted to see this was adequate.  I've
seen numerous other tip bends that take the whole pipe well below the
extended lower cowl line.  This scenario just looked a little to draggy
from my perspective.

The effort on this project was the numerous fit checks removing and
reinstalling the last section of pipe.  Mine are coated and rather tight
to install and remove.

Hope this wordy blurb describes it well.  Let me know if I can be more
clear.

Larry