I've got an exhuast manifold bolt who's head broke off in the head. I drilled a pilot hole in it and I dried to remove the bolt with a screw extractor, and sure enough the tip off the thing broke inside the pilot hole. I've tried drilling it out and it only seems to be eating up drill bits. Am I outta luck, or is there an easy way to get it out. Thanks!!! It's not what you buy, it's what you build!