N54 Exhaust Camshaft Tool This tool is needed when the exhaust camshaft needs to be removed from the engine for N series engines to change lifters or headgasket or stems, without these special tools you cannot do the job, it will damage the cylinder head.Bmw Tool Numbers 11 44 60 11 8 550 11 8 551 11 8 552 11 8 55383 30083 49583 739