This new final drive cover is also a cooler.  It is all aluminum and will keep your gear lube cooler, which helps reduce the risk of oil leaks.  This new pan has a drain plug that makes changing the final drive oil easier and less of a dirty job.  It comes with two predrilled holes, which are plugged  One for filling and one for a temperature sensor.  Both of these additional holes are plugged.  the cover comes with a new gasket and new mounting holes