[Mohuska]

You definitely don't want to put in one of the cylinder exhausts. I have a TWM stack system with FAST controller. My sensor is located in the collector. That gives you the "average" of at least one side. Ideal would be a sensor in each side just below the collector. You will get more accurate readings below the collector.

It doesn't look bad. Mine is on the inside (closest to body). The wiring is wrapped in aluminum shielding and nearly matches my side pipes.

That's my .02.

Mike