- 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 3981 is engineered for the performance enthusiast seeking outstanding acceleration, fuel efficiency, and long-lasting durability. Designed with a fine iridium tip and tapered cut ground electrode, this spark plug ensures improved starting, smoother idling, and responsive throttle performance across a wide range of vehicles and engines. Its iridium alloy electrode boasts a melting point six times higher than platinum, providing exceptional resistance to wear and corrosion even under high-temperature conditions. Trivalent metal plating enhances anti-corrosion and anti-seizing properties, making maintenance easier and extending the lifespan of the plug. Ideal for modified or high-performance applications, the Iridium IX can serve as an upgrade from standard OEM nickel alloy plugs, delivering consistent spark quality for optimal combustion.
This spark plug is compatible with various powersports and automotive applications, including ATV, motorcycle, snowmobile, and PWC models from manufacturers such as Honda, Kawasaki, Yamaha, KTM, and others. Its versatile fitment covers models like the Kawasaki KX80, Honda CR250R, and Can-Am 400 MX-6, among many others. Whether you're upgrading your vehicle’s ignition system or improving performance on the track or trail, this plug provides reliable ignition and enhanced engine response. The plug’s compact design and robust construction make it suitable for high-performance engines where durability and quick ignition are critical. For even greater performance, NGK offers alternatives like the Ruthenium HX, which further elevates ignition efficiency.
Each box contains four NGK Iridium IX Spark Plugs, ensuring you have plenty to replace or upgrade multiple engines or vehicles. The plugs are not only engineered for superior performance but also constructed with environmentally conscious materials, complying with relevant standards. Proper installation and regular maintenance help maximize the benefits of this advanced spark plug technology, ensuring your engine runs smoothly and efficiently over time.
Features:
- Designed for high-performance and modified applications
- Iridium fine wire center electrode provides six times the durability of platinum
- Tapered cut ground electrode enhances starting, idling, and throttle response
- Trivalent metal plating offers superior anti-corrosion and anti-seizing properties
- Compatible with a wide range of powersports and automotive models
- Includes four spark plugs per box for multiple replacements
- Engineered to improve acceleration, fuel efficiency, and durability
- air_freight_prohibited:
- false
- not_carb_approved:
- false
- ltl_freight_required:
- false
- prop_65:
- Unknown
- part_type:
- automotive
- epa:
- N/A
- carb_acknowledgement_required:
- false
- regular_stock:
- t
- units_per_sku:
- 4
- Mod Category:
- Performance
- Mod Subcategory:
- Ignition
