Hey thanks guys. I am not going to be racing just bashing and the engine i choose will be for a Nitro evader to bash with as there are no tracks where i live[]. I thinh i am going to go with a OS 18 cvrx but i am not sure. If there are any other engines that would bolt in to the evader and give me the same speed and durability please post them i would probably rather an 18 cause they have a bit more power.