[Feature:]- This Single Propeller Fuel Saver Turbonator Fan provides a more dynamic control over the intake system by forcing powerful airflow into the combustion chamber at a high speed. - Once the engine is started， the propellers spin to create a maximum turbulence in the incoming airstream to allow enhanced fuel atomization in the combustion chamber， resulting in significant increase in horsepower and better gas / fuel millage. - With simple installation steps， you can enjoy going faster and furtherer whilst saving gasoline all at the same time ! - With rubber rings for fitting adjustment[Specification:]- Material: Light Weight High Quality Aluminum - Size: Fit all intake hose from 64mm to 73mm. - Note: A quick measurement is suggested to ensure best fitment due to possible air intake hose size discrepancies between countries - Installation: - Remove air inlet hose located between air purifier. - Put the Intake Fan into the air inlet hose. - If the Intake Fan is smaller than the air inlet hose， use the rubber holder attached to increase its diameter so it can fit in the tube.[What's inside:]- 1 x Single Propeller Turbo Air Intake Saver Fan - 2 x Non-slip Rubber Holder