The benefits of using the M122
(actually H122) starts with the obvious larger displacement.
122ci per rotation as opposed to
112ci of the stock M112.
Other than that the actual rotors
are a revised design known to Eaton engineers as 5th Gen.
The one benefit you can see is the
HUGE intake. Eaton must have learned from all the ports done
Most of the tricks used on the M112 are cast
to the case.