NGK Spark Plug CMR6H

NGK Spark Plugs (U.S.A.), Inc. is the largest OE supplier and manufacturer of spark plugs, oxygen sensors, and A/F sensors for domestic and import vehicles in North America.All NGK Spark Plugs must pass extensive testing procedures and quality checks throughout the manufacturing process to ensure fit and performance.-Mechanical vibration testing-Thermal shock testing to -40 degrees F-Tightest resistor manufacturing process in the industry-Manufacturing in our ISO 11565 certified facility-Gap measured with laser precision throughout production process.