comes with a complete list of engines this is for all Ford, car's and trucks, 4.6l, 5.3l, 6.8l and several other engines. Has self centering drill head with self centering tap and thread insertion tool. Thread replacements are cast not aluminum or metal for permanent replacement and stop the need to be done anymore. Kit has 6 cast replacements. used 2 when purchased because our engine had 2 stripped spark plug holes. The spark plug drilling, tapping and replacement thread insertion took less than an hour for both plug holes. originally paid $175 plus taxes for this kit but it was definitely worth it!
