well i got hitec HS-645mg in my mt2....work well, cheap, and its a direct drop. u can use it with the original servo saver.

Torque 4.8/6.0v : 107 / 133 oz.
Speed 4.8/6.0v : 0.24 / 0.20 second
Size : 1.6"x 0.8"x 1.5"
Weight : 1.94 oz.
dual BB, metal gear

i got a JRZ590 in my evader work well too but a bit more noisy and i'm not sure that the original saver in the mt2 will fit. better bring your truck to your LHS.....