Fdanielson, so once you drilled the head off you removed the upper portion of filter mount and used pliers or something to continue un-screwing the remaining bit of bolt? I've never had to torture a bolt or screw on my car but I'll start with these two if thats what it takes. Once i heat it and pound it and finish by stripping the head tomorrow with the allen key, I'll end up drilling it out like you suggested. Thanks for your help fd.