This is one of 2 Mammoth's I have. This one has the stock 24.7 in it, the other one is what needs a new engine. Had it out all weekend and it's got tons of power, breaks all 4 tires loose with nothing more than an SH "Max Torque" pipe and header. It tuned effortlessly and has ran solid as long as I've had it. It does have the rotostart which I think I'm going to swap out for a Sullivan Tigerdrive to standardize my starter setup, and since it's difficult to insert the starter shaft from the rear of the vehicle, between the dogbone and the upper a-arm.