Profile: NGK Spark Plugs (USA), Inc. produces spark plugs for virtually every automotive, motorcycle, marine and small engine application. We are accredited with ISO 9002/QS-9000/ISO 14001 certification. Our products include spark plugs, oxygen sensors, wire sets, power cables, and performance/accessories. Our brands include NGK™, and NTK™. Our oxygen sensors are used in modern automobiles to control the fuel and ignition systems to optimize a car's performance in the areas of emission and fuel economy. Sensors are located before and after the catalytic converter to check on the amount of oxygen in the exhaust. The sensor sends signals to the car's on-board computer, which can then adjust several variables, including air/fuel ratio and timing, in order to bring the engine into the optimum operating range. Our spark plug wire sets are built to meet stringent OEM tolerances for a variety of import vehicles.