I will say that the 2013 is a good pipe on small tight tracks for this motor but it doesn't get as good of fuel mileage. the 2056 pipe is what you are going to want with this motor, you get the best of both worlds, good mileage and a good pipe for small and large tracks. one other thing, do not tune the motor to temps, tune to performance, smoke and sound, then check the temp only as a reference point. these motor will run cool. mine in a truggy normally runs between 175 to 205 just depending on the conditions. When I was at the psycho nitro blast I was lucky to see my temp above 170 and it was running like a bat outa hell with good smoke trail. So don't get to caught up on temps.