This kit adds a spacer and servo horn to utilize the factory Capra servo.

The factory servo, if setup properly works sufficiently to activate the dig on the stock transmission.  However a good upgrade is either the Reefs micro 99, Reefs micro smart 179 or NSDRC RS100 micro servo.

If you are using an aftermarket micro servo, with the same dimensions as the Reefs 99 micro servo, for the dig function you do not need the stock servo mount kit.

A 14mm servo horn is suggested for proper dig function.