Selecting MOSFETs for Motor
In its intended application (1/10th scale RC car) that motor could draw over 30A when the vehicle is accelerating. For efficiency you want the FETs to have low voltage drop (&lt;0.1V), so the most important parameter is RDson (at 35A it should be 0.0035 Ohms or less). As a result they may end up rated for much higher current than you need, which is good because then you won't need an enormous heat sink to keep them cool. 

That motor is normally powered from a 7.4V or 11.1V battery. FETs rated at 30V should be fine so long as you stay below 26V.