NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug. NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. ATV - 2002-99 BRP, 2008-81 HON, 2009-85 KAW, 2007-02 KYMCO, 2004-85 SUZ, 2008-87 YAM, M/C - 2004-85 APRILIA, 2004-96 BMW, 1985-84 CAN AM, 1990-85 DUCATI, 2002-70 HON, 1986-84 HUSQ, 2006-80 KAW, 2002-93 KTM, 2008-78 SUZ, 2008-75 YAM

RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
Trivalent metal plating for superior anti-corrosion and anti-seizing properties
Outstanding acceleration, high fuel efficiency and durability
Fine iridium tip ensures durable and consistent spark

The NGK Iridium IX Spark Plug Part Number 6681 is designed to meet the needs of performance enthusiasts seeking reliable ignition and superior fuel efficiency. Crafted with a fine iridium tip, this spark plug offers exceptional durability and consistent sparks, even under demanding conditions. Its tapered cut ground electrode enhances starting, idling, and throttle response, making it an ideal upgrade from standard nickel alloy plugs. The iridium alloy's high melting point ensures optimal performance in modern engines, providing long-lasting service and improved acceleration.
The trivalent metal plating on NGK Iridium IX plugs delivers superior anti-corrosion and anti-seizing properties, reducing maintenance and ensuring dependable operation over time. Suitable for modified or high-performance applications, these plugs are an excellent choice for enthusiasts looking to maximize engine output and efficiency. Designed to fit a wide range of vehicles, including ATVs, motorcycles, and select models from Honda, Kawasaki, Yamaha, KTM, and more, they are a versatile upgrade for many engine types.
Whether you're replacing worn-out OEM plugs or enhancing your vehicle's performance, NGK Iridium IX spark plugs provide the reliable spark needed for smooth, efficient operation. Their outstanding acceleration, high fuel efficiency, and durability make them a popular choice among professional mechanics and car enthusiasts alike, ensuring your engine runs at its best with every start and throttle. Ensure your vehicle benefits from the best ignition technology by choosing NGK's proven performance spark plugs, backed by extensive compatibility and high-quality manufacturing standards.

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