but there is only 1 problem with that!! the rustler is already to squirrelly with the engine it already has i would not get that cuz then it would be even more squarely!! if i was u i would get the OS .12 or the .15 not the .18 cuz of the squrrly part!!!!! dont get the .18 i mean the engine already has a .15 in it so if u put a .18 u probably couldnt even control it!!! I'm serious here don't get it!!!