Wear-resistant internal valve core ensures flexible opening and closing, not easy to get stuck. 036906031M Fuel Injector Nozzle For Vw For Polo 036 906 031M 4PCS ; It is resistant to wear and tear, ensuring long asting durability even in challenging driving conditions； The main function of the fuel injector is to send fuel in the form of spray into the engine combustion chamber, so that it is mixed with air to form a combustible mixture for normal engine operation； High flow design makes power output more smooth and improves driving experience., Manufacturer: QDouiMOO