Since 1936, NGK Spark Plugs has been the world leader in technology, innovation, and world-class quality in the design of spark plugs and oxygen sensors. Our commitment to excellence continues to be the driving force behind the company’s advanced research and development programs. Ceramics, at the core of superior spark plug technology, spawned the creation of NTK Technical Ceramics. Additional li...nes of products followed; NGK Wire Sets, NTK Oxygen Sensors, NTK Knock Sensors and a variety of other NTK sensors. Today, the company manufactures spark plugs and oxygen sensors for virtually every automotive manufacturer in the world, and has set some groundbreaking industry firsts along the way including:- Introduction of copper core spark plugs to the consumer market.- The pioneering development of new ceramics and its revolutionary application to integrated computer circuitry.- Introduction of the "V-Groove" spark plug, which proved ideal for clean-burning, lower-emission engines.- Introduction of iridium spark plugs for OEM and performance markets.- Continuing environmental and anti-pollution efforts.