Wear-resistant internal valve core ensures flexible opening and closing, not easy to get stuck. Car Fuel Injector For Buick 17089569 Fuel Injector; Fuel injectors directly affect the air/fuel ratio for the engine and new fuel injectors do require a new or updated tune； Reduce emissions: Replacing the fuel injector can improve the combustion process, reduce the production of incompletely burned fuel residues and harmful gases, and reduce the emission level of the car； High flow design makes power output more smooth and improves driving experience., Manufacturer: QDouiMOO