Do i have this correct: The A.I.R. equipment is on the header and the o2 sensor is on the y-pipe, and you need the A.I.R. equipment to pass emissions? Thanks

 

the air tubes go into each tube of the manifold, and one to the cat. the only o2 sensor on my car is on the driver side manifold. if all the equipment is there and appears functional, it will pass unless they do emissions. it may or may not pass the sniffer. mine wouldnt pass with a non functioning pump, and i had to install one to get my sticker. but the mechanic never checked it, and i took it off when i got home and took it back for my $70

 

It depends on what your states inspection is like. I feel though if you have emission inspection then the best thing to do is to leave all your stuff on and make sure it works. California has the strictest and if I can have my cars pass it works for me.