An apparatus for evacuating exhaust from an exhaust pipe of a vehicle having an external turbine and an internal turbine connected to the external turbine such that when the external turbine rotates the internal turbine rotates.
An apparatus for evacuating exhaust from an exhaust pipe of a vehicle having an external turbine and an internal turbine connected to the external turbine such that when the external turbine rotates the internal turbine rotates. An apparatus for evacuating exhaust from an exhaust pipe of a vehicle having an external turbine, an external motor assembly and an internal turbine connected to the external motor assembly such that the external motor assembly rotates the internal turbine, and the external turbine drives the external motor assembly when the external turbine reaches a greater rate of rotation than the external motor assembly.