Removal? Just removed mine and it's not as bad as it looks. Three 12mm fasteners on the head and two on the intake. For wrench and arm clearance to get the other three out(1 nut and 2 bolts), loosen the pipe union first with a crescent wrench or box end and remove the portion attached to the intake . Get something to stand on so you can lean over the engine far enough to reach them and see what your doing. I used a concrete block. Break them free with a 3/8 drive deep well socket and wrench. Remove them w/ a 3/8 stubby socket wrench. Luck to ya