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I guess I'm a little lost here but how does your engine run worth a crap without an o2 sensor?  I thought it needs them for the computer to meter the air/fuel ratio and ignition right. I now it'll run without them or bad at that but how are you getting by without them? 


I read where you guys stated you need 1' to 3' length of exhaust after the o2 location for it to read correctly. No way to run a small tube between two exhaust tubes close to the head and mount one up there? My old Toyota had a Downey header that had this. This way your picking up two cylinders vs just one for a better reading.


Seems to me you must be having running issues if you have to have one installed for a tune.


Just wondering.


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