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NGK Iridium Premium Spark Plugs - 3981

NGK Iridium Premium Spark Plug Box of 4 (BR9EIX)
Availability: In stock
Part number: 3981
Manufacturer: NGK
$34.33
In stock — usually ships within 1 business day

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.

The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX® the ideal choice for any performance enthusiast. Iridium's high melting point is perfectly suited to today's high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability.

ATV - 1988-82 HON, M/C - 2006-82 APRILIA, 1987-77 CAN AM, 2005-01 GAS GAS, 2007-73 HON, 2006-90 HUSQ, 1998-74 KAW, 2004-80 KTM, 1998-75 SUZ, 2006-72 YAM, PWC - 1999-93 ARC CAT, 2006-95 KAW, 2004-98 POL, SNOW - 1997-73 ARC CAT, 1981-76 YAM

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability.

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

NGK Iridium Premium Spark Plug Box of 4 (BR9EIX)

BR9EIX, Sold Individually, for Box Order: 4

NGK Iridium IX Spark Plug

Iridium IX Spark Plug

Spark Plug

673 confirmed fitments Showing up to 250 applications from our fitment database.
1969 2 fitments
Yamaha AT1 Base
Yamaha SS338 Base
1970 5 fitments
Sno-Jet Star-Jet 292 Hirth Base
Sno-Jet Super-Jet 338 Base
Yamaha AT1 Base
Yamaha AT1M Base
Yamaha RT1 Base
1971 9 fitments
Sno-Jet S/S Jet 292 Base
Sno-Jet S/S Jet 338 Base
Sno-Jet S/S Jet 433 Base
Sno-Jet Star-Jet 292 Hirth Base
Sno-Jet Star-Jet 338 Base
Yamaha AT1 Base
Yamaha AT1M Base
Yamaha RT1 Base
Yamaha SS433 Base
1972 9 fitments
Sno-Jet SST 292 Base
Sno-Jet SST 338 Base
Sno-Jet SST 433 Base
Sno-Jet Star-Jet +2 338 Base
Sno-Jet Star-Jet 292 Hirth Base
Sno-Jet Super-Jet 433 Base
Yamaha AT2M Base
Yamaha EW643 Base
Yamaha RT2 Base
1973 13 fitments
Arctic Cat Panther 440 Base
Arctic Cat Puma 440 Base
Honda CR250M Base
Sno-Jet SST 340 Base
Sno-Jet SST 440 Base
Sno-Jet Star-Jet 338 Base
Sno-Jet Star-Jet 433 Base
Yamaha EW643 Base
Yamaha GP292 Base
Yamaha RT2 Base
Yamaha RT3 Base
Yamaha SR433 Base
Yamaha SR643 Base
1974 14 fitments
Arctic Cat El Tigre 295 Base
Harley-Davidson SX175 Base
Honda CR250M Base
Kawasaki KX125 Base
Kawasaki KX250 Base
Sno-Jet SST 340 Base
Sno-Jet SST 440 Base
Yamaha DT360 Base
Yamaha GP292 Base
Yamaha GPX338 Base
Yamaha GPX433 Base
Yamaha MX125 Base
Yamaha YZ125 Base
Yamaha YZ250 Base
1975 18 fitments
Harley-Davidson SS250 Base
Harley-Davidson SX175 Base
Honda CR250M Base
Kawasaki KX125 Base
Kawasaki KX250 Base
Kawasaki KX400 Base
Sno-Jet SST 440 Base
Sno-Jet SST F/A 340 Base
Sno-Jet SST F/A 440 Base
Suzuki RM125 Base
Yamaha DT400 Base
Yamaha GPX338 Base
Yamaha GPX433 Base
Yamaha MX125 Base
Yamaha MX400 Base
Yamaha SR643 Base
Yamaha YZ125 Base
Yamaha YZ250 Base
1976 24 fitments
Harley-Davidson SS125 Base
Harley-Davidson SS175 Base
Harley-Davidson SS250 Base
Harley-Davidson SXT125 Base
Honda CR250M Base
Kawasaki KX125 Base
Kawasaki KX250 Base
Kawasaki KX400 Base
Sno-Jet SST 440 Base
Sno-Jet SST F/A 340 Base
Sno-Jet SST F/A 440 Base
Suzuki GT250 Base
Suzuki RM100 Base
Suzuki RM125 Base
Suzuki RM250 Base
Suzuki RM370 Base
Yamaha DT400 Base
Yamaha EX340 Base
Yamaha EX440 Base
Yamaha MX125 Base
Yamaha SRX440 Base
Yamaha TY175 Base
Yamaha YZ125 Base
Yamaha YZ250 Base
1977 19 fitments
Arctic Cat El Tigre 5000 Base
Arctic Cat Panther 4000 Base
Arctic Cat Z 250 Base
Bultaco Pursang 250 Base
Can-Am 175 MX-3 Base
Harley-Davidson SS125 Base
Harley-Davidson SS175 Base
Harley-Davidson SS250 Base
Harley-Davidson SXT125 Base
Suzuki GT250 Base
Suzuki RM100 Base
Suzuki RM125 Base
Suzuki RM250 Base
Suzuki RM370 Base
Yamaha EX340 Base
Yamaha EX440 Base
Yamaha IT250 Base
Yamaha SRX440 Base
Yamaha YZ250 Base
1978 17 fitments
Arctic Cat Pantera 5000 F/A Base
Arctic Cat Pantera 5000 F/C Base
Arctic Cat Panther 4000 Base
Bultaco Pursang 250 Base
Honda CR250R Base
Kawasaki KX125 Base
Kawasaki KX250 Base
Suzuki PE175 Base
Suzuki RM100 Base
Suzuki RM125 Base
Suzuki RM250 Base
Yamaha EX340 Base
Yamaha EX440 Base
Yamaha IT250 Base
Yamaha SR433 Base
Yamaha SRX440 Base
Yamaha YZ250 Base
1979 14 fitments
Arctic Cat Pantera Base
Arctic Cat Panther Base
Bultaco Pursang 250 Base
Honda CR250R Base
Kawasaki KX125 Base
Kawasaki KX250 Base
Suzuki RM100 Base
Suzuki RM125 Base
Suzuki RM250 Base
Yamaha EX440 Base
Yamaha IT175 Base
Yamaha IT250 Base
Yamaha SRX440 Base
Yamaha YZ250 Base
1980 25 fitments
Arctic Cat Pantera Base
Arctic Cat Pantera ES (Electric Start) Base
Arctic Cat Panther Base
Arctic Cat Trail Cat 400 Base
Can-Am 400 MX-6 Base
Honda CR250R Base
Honda CR80R Base
Kawasaki KDX175 Base
Kawasaki KX125 Base
Kawasaki KX250 Base
Kawasaki KX420 Base
Kawasaki KX80 Base
Suzuki PE250 Base
Suzuki PE400 Base
Suzuki RM100 Base
Suzuki RM125 Base
Suzuki RM250 Base
Yamaha DT175 Base
Yamaha EX440 Base
Yamaha IT125 Base
Yamaha IT175 Base
Yamaha IT250 Base
Yamaha SRX440 Base
Yamaha YZ250 Base
Yamaha YZ50 Base
1981 28 fitments
Arctic Cat El Tigre 5000 F/C Base
Arctic Cat Jag 4000 Base
Arctic Cat Pantera Base
Arctic Cat Pantera ES (Electric Start) Base
Arctic Cat Panther Base
Arctic Cat Panther West Base
Arctic Cat Trail Cat 400 Base
Honda CR250R Base
Honda CR80R Base
John Deere Liquifire 440 Base
John Deere Sportfire Base
John Deere Trailfire 440 Base
Kawasaki KDX175 Base
Kawasaki KX125 Base
Kawasaki KX250 Base
Kawasaki KX420 Base
Kawasaki KX80 Base
Suzuki PE400 Base
Suzuki RM100 Base
Suzuki RM250 Base
Suzuki RS250 Base
Yamaha DT175 Base
Yamaha EX440 Base
Yamaha IT125 Base
Yamaha IT175 Base
Yamaha IT250 Base
Yamaha YZ250 Base
Yamaha YZ60 Base
1982 21 fitments
Honda CR80R Base
Honda FL250 Odyssey Base
Husqvarna XC125 Base
John Deere Liquifire 440 Base
John Deere Sportfire Base
John Deere Trailfire 440 Base
Kawasaki KDX175 Base
Kawasaki KE125 Base
Kawasaki KX125 Base
Kawasaki KX250 Base
Kawasaki KX80 Base
Suzuki RM125 Base
Suzuki RM465 Base
Suzuki RM80 Base
Yamaha IT175 Base
Yamaha IT250 Base
Yamaha YZ100 Base
Yamaha YZ125 Base
Yamaha YZ250 Base
Yamaha YZ60 Base
Yamaha YZ80 Base
1983 15 fitments
Honda CR60R Base
Honda CR80R Base
Honda FL250 Odyssey Base
Husqvarna XC125 Base
Kawasaki KDX200 Base
Kawasaki KX500 Base
Kawasaki KX60 Base
Kawasaki KX80 Base
Kawasaki ZX750 GPZ Base
Suzuki RM125 Base
Yamaha IT175 Base
Yamaha IT250 Base
Yamaha YZ125 Base
Yamaha YZ60 Base
Yamaha YZ80 Base
1984 17 fitments
Arctic Cat Panther Base
Honda ATC250R Base
Honda CR60R Base
Honda CR80R Base
Honda FL250 Odyssey Base
Husqvarna XC125 Base
Kawasaki KDX200 Base
Kawasaki KDX250 Base
Kawasaki KDX80 Base
Kawasaki KX500 Base
Kawasaki KX60 Base
Kawasaki KX80 Base
Kawasaki ZX750 GPZ Base
Kawasaki ZX750E Turbo Base
KTM 250 MXC Base
Suzuki RM125 Base
Suzuki RM80 Base

This product has more fitments than shown here. Send us your exact year, drivetrain, trim, and any swap details if you want us to confirm your specific car.

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