The BPR9ES is a spark plug designed for passenger cars and trucks. It offers improved anti-fouling, durability, and performance from its predecessor, the BPR6E. The BPR9ES features a patented center electrode technology that helps prevent fouling by reducing the amount of carbon buildup on the electrode. This design also has a longer service life than other plugs in its class. NGK Spark Plugs are engineered to provide superior ignition performance while maintaining optimum engine efficiency.