Optimizes fuel combustion efficiency to save fuel consumption. For TOYOTA for CARINA for Karina for COROLLA,Material:Plastic + Metal,Cleans and protects the entire fuel system,Recoveries: lost power, acceleration, fuel economy and fuel gauge sensor operation. Package Contents: 4 X Fuel Nozzle injector ,Stable fuel injection pressure, reducing carbon deposits and poor fuel atomization through long-term use of the nozzle. High-efficiency combustion ensures complete fuel combustion, and high-quality and durable materials ensure you don't need to replace the fuel injector frequently, which also means you can save on costs. Effectively reduces engine exhaust emissions., Manufacturer: NMJLQW