NGK SPARK PLUGS BR9EIX 3981 Iridium IX Spark Plug 10 PACK

OVERVIEW

The NGK BR9EIX Iridium IX spark plugs deliver precise ignition timing and reliable engine performance across snowmobile, motorcycle, and scooter platforms. Built around a copper core and an ultra-fine iridium center electrode, these plugs ensure consistent cold starts and stable combustion under demanding trail conditions.

ENGINEERING & PERFORMANCE

The dramatically reduced iridium electrode diameter lowers the voltage threshold needed to bridge the spark gap, which directly extends the operational life of coils and ignition modules. A newly formulated metal shell plating actively resists corrosion from moisture, salt, and chemical trail treatments. Engineered as direct OEM replacements, these plugs maintain factory heat ranges and thread geometries for straightforward installation without aftermarket adapters or tuning.

KEY FEATURES

• Iridium IX series with advanced ceramic insulator geometry
• Center electrode measures 75% smaller than conventional nickel designs
• Reduced electrical demand preserves battery and CDI system longevity
• Anti-corrosion plated exterior shields against slush and road salts
• Precise OEM threading and reach dimensions ensure secure seating
• Controlled electrode gap promotes consistent flame kernel development
• 10-count packaging aligns with standard multi-cylinder maintenance schedules
• Direct cross-reference for major manufacturer stock numbers

TECHNICAL SPECIFICATIONS

• Brand: NGK
• Part Name: BR9EIX Iridium IX Spark Plug
• Component Type: Spark Plug
• Material: Copper core, iridium-tipped electrode, anti-corrosion coated shell
• Supported Years: 1997–2024
• Compatible Trims: Ski-Doo Summit, MX-Z, Skandic, Tundra, GTX, Expedition; Yamaha YZ, Venture, V-Max, Phazer, SX Viper/Venom; Vespa ET2 50R

FITMENT

• Ski-Doo Summit, MX-Z, Skandic, Tundra, GTX, and Expedition snowmobile models (2000–2024)
• Yamaha YZ, Venture, V-Max, Phazer, and SX Viper/Venom series (1997–2009)
• Vespa ET2 50R scooters (1997–2005)

WHY RIDERS CHOOSE THIS

Riders select this spark plug lineup because the micro-diameter iridium tip generates a sharper, more immediate spark during cold weather breakoffs and high-altitude climbs. The lower voltage draw protects sensitive ignition circuitry while preventing misfires that plague older nickel-based units. Corrosion-resistant housing materials keep the contact surface clean season after season, eliminating fouling common in wet snow environments. With broad compatibility across popular sled and scooter platforms, these plugs remove guesswork from annual rebuilds and restore predictable throttle response across the rpm band.