Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
NGK Iridium IX spark plugs (BKR4EIX) feature a fine iridium center electrode and tapered ground electrode for improved throttle response, starting and anti-fouling. Engineered for modified or high-performance use, they provide excellent ignition stability, longevity and fuel efficiency thanks to iridium's high melting point and durable tip construction, making them a common upgrade from standard nickel plugs.
NGK Iridium BKR4EIX Spark Plugs
