Has anyone installed these on there engine that does not look for the second O2 sensor (i believe it would be an obd-1 engine)? I was wondering what do you do with the hole for the second oxygen sensor... is there a way to plug it up? Thanks for the help.

 

Usually on obd2 cars, there is one bung in the header for the o2 and one in the catalytic converter. I put this header temporarily on my 94 integra.