The PowerTone Tornado Vortex Muffler (U.S. Pat # 7,331,422) converts the heat and sound energy from the engine's exhaust into propulsion you feel every time you touch the gas pedal.

By allowing the hot exhaust gases to expand and then hit the specially placed fan blades, a vortex (the tip of a tornado) is created in a small pinch zone at the exit of the muffler. This increases the volume and speed at the outlet and since every action has an equal and opposite reaction, a low pressure zone or vacuum is created at the inlet. The low pressure works its way upstream, relieving backpressure. Not only will efficiency be increased, you will also save money at the gas pump and on repair bills.

Your engine no longer acts as a braking force due to backpressure relief. Once you attain a speed of 30 mph or more, you can remove your foot from the gas pedal and your vehicle will glide. We refer to this as "The Rolling Dynamic"; weight already in motion will continue until you apply the brakes. The scavanging effect that is created by the muffler also helps your automatic transmission upshift sooner, helping you get better gas mileage.