Tim,
Thanks for the input. The second pic of pipe (my pics) above has had a larger piece welded on to the old pipe to create a pad. Perhaps I'll remove the current pipe and take both to the welder and have him duplicate the angle while placing the old tab on to the pipe with the pad.
Here are two more pics.

This is the right side. Looking up into the cowling.
Can someone tell if they are using 304 or 321 to make these pipes? I'll be talking to Maule Friday so will ask them what they use.
It is a great plane and other than this and some peeling paints, it's been very reliable so guess I shouldn't complain. Weather isn't conducive to flying now so have time to get the job done.
Appreciate all the input from everyone.