if your wrench turner ( refuse to call him a mechanic at this point ) is arguing with you over weather or not you need an o2 sensor ...... listen to me very carefully ........ go get your burb and cut your losses and don't pay this ass another dime . from the sound of it he's not smart enough to know how to file a lean on your vehicle anyway.
You have to run at least one O2 . I ran one on my camaro w/ headers and had no problems .
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