Dynamite XP platinum .21 By far the best motor for the buck. I think i bought mine for 160 and now 4 gallons later its pulling like a freight train. Easy to break in, easy to tune, I didnt have to replace the stock plug till the 2nd gallon.. Ive been running mine on a losi truggy.. I ran the futaba nitro challenge with it and got second in expert truggy