[jdean]

The compromises in mounting the O2 in a Cobra are:
1) To get it sampling from all 4 pipes means putting it just after the collector....which makes it farther from the exhaust valve than the recommended 20" or so.
2) It is hard to mount them facing up from horizontal in a Cobra because of not enough clearance between the pipe and the body. Mine are mounted about 15 degrees down from horizontal, just behind the collector. I think the idea of facing upward is to keep moisture from collecting in the tip and then freezing.

They will work fine like this. Almost all Cobras I have seen have them mounted just after the collector and then either horizontal or downward a bit. I have seen some where it was mounted closer up but only in one pipe. I dont like that idea either.