sweeeeeeeeeet. the .18 is waaaaaaaaaay better than the stock engine. tons of torque, speed is incredible!! i beat out all other savages, revos, maxes, etc. all of them cant compete with me. i beat them off the line, out of the corners, and on the straights. i HIGHLY recommend this engine. 7 tanks of break in is the only drawback, but they go by quick as the needle settings are rich from the factory. the fuel consumption is smaller aswell(i dont know how but it is). with a 10 minute main i still have about 1/4 of a tank left. and the temps/needle settings are consistent aswell. get that thing as soon as possible. word from the wise, follow the instructions.