I have the First Rs4 Nitro RTR. I bought it used for $170 with 3 motors, an upgraded radio, upgraded servos, 2 bodies, and a tuned pipe. The motors are: Hpi .12 Nitro Star FE, HPI .15 Nitro star FE, and the O.S. CV-R with 10E Carb. But the O.S. lost compression cause it was used a lot [:@] But i think the Old RS4s are the best. Its very easy to use and its very durable.