You have to know the the Mayhem ST is direct drive. No transmission and all that other stuff that makes the Revo, T-Maxx etc. slower than they could be. The Mayhem ST is a good basher right out of the box but can be made race ready pretty easily. The stock .26 now the .26v2 is as fast and powerful a motor in its class. The only way it could be faster would be with a top of the line Novarossi RB Mod motor or maybe the new .28 8-Port Axial motors just being introduced to the US.