Muck76 you were correct that the .15 nitro stampede exhaust would fit up. It looks and fits like original! I will try it out this weekend to see how much it helps. Another thing to try to gain a little more speed is to remove the metal wheel bushings and install wheel bearings. I was wondering way the truggy had trouble coasting. The MG16 will gain more acceleration and top speed changing out the bushings to bearings. My Hobbico 1450 MAH battery and custom flat plastic cover works great!