Improve engine response speed and enhance vehicle functionality. Reduce the load on the engine oil pump and extend its service life. For Bora for Caddy for Golf for Lupo for Polo,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 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., Manufacturer: HJKDSZ