Improve engine response speed and enhance vehicle functionality. Reduce the load on the engine oil pump and extend its service life. For Toyota for Corolla for Auris for Avensis Rav4 ，Material:ABS+Metal,Stable fuel injection pressure, reducing carbon deposits and poor fuel atomization through long-term use of the nozzle. Package Contents:4 x Fuel Injector，Cleans and protects the entire fuel system,Recoveries: lost power, acceleration, fuel economy and fuel gauge sensor operation. Our fuel injectors have more complete atomization and combustion, greater power, more economical, more stable acceleration, smoother shifting, less knocking., Manufacturer: HJKDSZ