Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The NGK Iridium IX spark plug is engineered for drivers seeking high ignitability and durable service in tuned or high-output engines. A fine iridium tip and tapered ground electrode promote consistent spark, improved throttle response and smoother idling, while iridium's high melting point provides long life. Trivalent metal plating reduces corrosion and seizing, making the plug a durable upgrade from standard nickel alloy units.
NGK Single Iridium Spark Plug Box of 4 (TR8IX)
