NGK (5643) BKR5ESA-11 Spark Plug - Pack of 4 Exceptional ignition performance and tested durability with a 30,000 mile service life. Conventional Nickel center electrode provides a reliable spark with low installation cost. OE plug for many applications. Precision laser-welded electrode construction. Trivalent Metal Plating has superior anti-corrosion and anti-seizing properties.