Aluminum heads off of a 2010 5.7 Hemi had broken off exhaust manifold steel studs. Removing them easily with a mig welder. Trying to drill and use an easyout would make it worse if the hardened easyout breaks off. No drilling required and the stud comes out easily from the heat expanding the aluminum around the stud. I show how to get them out if you have a mig welder.