As long as it is the same gear pitch as your spur gear, most nitros use mod 1, associated has models that use other pitch like the rc10gt for example, i am not very familiar with the mgt 4.6
And regarding clutches, are you needing to replace stock from wear or wanting to upgrade?
most 1/8th scale nitro engine big block accessories are universal.
Just need to know if your model uses a 2 or 3 pin flywheel and 2 or 3 or 4 shoe clutch if you plan to use the stock flywheel.