Once again, I have not tried it, but would guess if tuned, it would always be an improvement over any muffler. A Jett muffler or even a Mousse ca muffler would help. A real pipe needs to be very rich at full throttle, or there will be overheating, which can be hard on the nickel plating. The exhaust port is low at maybe 150 degrees? Any motor pretty much should be around 180 degrees for the full pipe effect. Grinding or machining the exhaust port with nickel plating is flirting with trouble. I took out the baffle in mine and opened the exhaust hole to the next drill size. I never run mine at full throttle because things start shaking and any tight turns and rolls would likely break the ancient Twist, and I kind of like it.