Fuel injectors must deliver precisely the right quantity of fuel at exactly the right instant, thousands of times per minute, or performance, economy and engine smoothness will suffer. Denso fuel injectors have been a top choice in the industry for their rigorous standards and performance. Premium internal components and welded-seal construction. Calibrated impedance assures full system compatibility. Maintains new car smoothness and drivability. Denso's injectors finer fuel spray significantly reduces exhaust emissions.