Well me and my buddy just got done running our rustlers and I'm so happy.. We just got our engines back today from Jesse the port guy..They were fully ported and everything. I have to say it was the best porting job I've ever seen!!! Anyway on my O.S cv I couldnt keep the tires on the ground and the top end was amazing..On my friends rustler he has a TRX engine and it screamed!!It was so much faster and had tons of torque compared to the stock engine..He was doing some sweet wheelies as well!!