Another good reason for welding the two short sections is that, because the gasket closest to the cylinder is always the one to blow most often (and sometimes the nuts that hold the exhaust on tend to seize on the exhaust studs) it can be a real pain to have to continually remove that section.
If the nuts have seized on the studs, to remove the exhaust, you'll end up unscrewing the threads from the cylinder heads and sometimes they will come part way out and stop, or snap off half of the exposed stud length.
Fit a new gasket between the short sections, line the two section up as if you are refitting it, simply to get the correct angle to refit to the cylinder head and weld that sucker up ..... saves you a fortune in gaskets and a lot of time in strip and refit sessions.
Once that upper gasket wont be able to blow in future, the only gasket that'll ever blow will be the lowest one, as the gaskets that go into the muffler pipes, shouldn't blow, buy may degrade or be squashed if you roughly handle the mufflers when refitting them.
Don't think about welding any other sections up, otherwise, you wont be able to refit the exhaust.
Last edited by Screaming Chief; 04-26-2014 at 03:10 PM.