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NGK IX Iridium Spark Plug (CR9EIX) - Box of 4 — Fits Kawasaki Ninja, Suzuki GSX-R

NGK IX Iridium Spark Plug (CR9EIX) - Box of 4 — Fits Kawasaki Ninja, Suzuki GSX-R
NGK IX Iridium Spark Plug (CR9EIX) - Box of 4 — Fits Kawasaki Ninja, Suzuki GSX-R
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NGK IX Iridium Spark Plug (CR9EIX) - Box of 4 — Fits Kawasaki Ninja, Suzuki GSX-RNGK IX Iridium Spark Plug (CR9EIX) - Box of 4 — Fits Kawasaki Ninja, Suzuki GSX-R
NGK

NGK IX Iridium Spark Plug (CR9EIX) - Box of 4 — Fits Kawasaki Ninja, Suzuki GSX-R

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SKU: NGK3521
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches
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Product Details

Product Description
Part Numbers
Sizing & Fit

About NGK

NGK engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full NGK lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

NGK IX Iridium Spark Plugs (CR9EIX) - Unleash Peak Performance

Designed for the true performance enthusiast, NGK IX Iridium Spark Plugs (CR9EIX) are engineered to deliver an unparalleled ignition experience. These plugs provide exceptional acceleration, enhanced fuel efficiency, and superior durability, making them an ideal upgrade for a wide range of high-performance motorcycles. Each box contains 4 premium iridium spark plugs, ready to transform your ride.

Advanced Iridium IX Technology:

  • Extreme Ignitability: The fine wire iridium center electrode ensures a powerful, consistent spark every time.
  • Exceptional Anti-Fouling: Maintains clean operation for reliable performance over time.
  • Tapered Cut Ground Electrode: Improves starting, idling stability, and throttle response for a smoother ride.
  • Superior Durability: Iridium alloy is six times harder than platinum, offering extended plug life and resistance to wear.
  • High Melting Point: Iridium's extreme melting point makes it perfect for the demands of modern, high-performance engines.

Upgrade your Kawasaki Ninja ZX-11, ZX-6, ZX-7, ZX-9R, Suzuki GSX-R600, GSX-R750, GSX-R1100, Aprilia RSV4, or Arctic Cat Bearcat with the proven performance of NGK Iridium IX. For those seeking the absolute pinnacle of ignition technology, consider the NGK Ruthenium HX plug. Find your performance edge at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2010 Aprilia RSV4 Factory Base
2011 Aprilia RSV4 Factory SE Base
2010-2011 Aprilia RSV4 R Base
2006-2009 Aprilia Scarabeo 100 Base
2016-2019 Arctic Cat Bearcat 7000 XT Base
2017-2018 Arctic Cat Bearcat 7000 XT GS Base
2016 Arctic Cat M 7000 Limited 153 Base
2016 Arctic Cat M 7000 Limited 162 Base
2015-2016 Arctic Cat M 7000 Sno Pro 153 Base
2016 Arctic Cat M 7000 Sno Pro 162 Base
2015-2016 Arctic Cat Pantera 7000 Base
2018 Arctic Cat Pantera 7000 Base
2015-2019 Arctic Cat Pantera 7000 Limited Base
2016-2019 Arctic Cat Pantera 7000 XT Limited Base
2020 Arctic Cat Wildcat XX Base
2015 Arctic Cat XF 7000 Cross Country Base
2014 Arctic Cat XF 7000 Cross Country Sno Pro Base
2014-2018 Arctic Cat XF 7000 Crosstour Base
2016-2018 Arctic Cat XF 7000 Crosstrek Base
2015-2016 Arctic Cat XF 7000 High Country Base
2014-2015 Arctic Cat XF 7000 LXR Base
2014-2015 Arctic Cat XF 7000 Limited Base
2014-2015 Arctic Cat XF 7000 Sno Pro Base
2018 Arctic Cat ZR 7000 129 Base
2018-2019 Arctic Cat ZR 7000 137 Base
2015-2017 Arctic Cat ZR 7000 El Tigre Base
2014-2015 Arctic Cat ZR 7000 LXR Base
2016-2017 Arctic Cat ZR 7000 LXR 129 Base
2016-2017 Arctic Cat ZR 7000 LXR 137 Base
2014-2015 Arctic Cat ZR 7000 Limited Base
2016 Arctic Cat ZR 7000 Limited 129 Base
2016-2019 Arctic Cat ZR 7000 Limited 137 Base
2019 Arctic Cat ZR 7000 Limited 137 iACT Base
2015-2016 Arctic Cat ZR 7000 RR Base
2014-2015 Arctic Cat ZR 7000 Sno Pro Base
2016 Arctic Cat ZR 7000 Sno Pro 129 Base
2018 Arctic Cat ZR 7000 Sno Pro 129 Base
2016-2018 Arctic Cat ZR 7000 Sno Pro 137 Base
2002-2003 Cannondale Blaze 440 Base
2002 Cannondale C440R Base
2002-2003 Cannondale Cannibal 440 Base
2002 Cannondale E440 Base
2002 Cannondale Moto 440 Base
2002-2003 Cannondale Speed 440 Base
2002 Cannondale X440 Base
2004-2006 Ducati 749 Base
2005-2006 Ducati 749 Dark Base
2004-2005 Ducati 749R Base
2004-2006 Ducati 749S Base
2003 Ducati 998 Biposto Base
2004 Ducati 998 Matrix Base
2003 Ducati 998 Monoposto Base
2004-2007 Ducati ST3 Base
2018 Harley-Davidson FLDE Deluxe 107 Base
2018 Harley-Davidson FLFB Fat Boy 107 Base
2018 Harley-Davidson FLFBS Fat Boy 114 Base
2018 Harley-Davidson FLHC Heritage Classic 107 Base
2018 Harley-Davidson FLHCS Heritage Classic 114 Base
2017-2019 Harley-Davidson FLHR Road King Base
2017-2019 Harley-Davidson FLHRXS Road King Special Base

…and 230 additional fitments. Contact us to confirm yours.

Product Details

Product Description
Part Numbers
Sizing & Fit

About NGK

NGK engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full NGK lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

NGK IX Iridium Spark Plugs (CR9EIX) - Unleash Peak Performance

Designed for the true performance enthusiast, NGK IX Iridium Spark Plugs (CR9EIX) are engineered to deliver an unparalleled ignition experience. These plugs provide exceptional acceleration, enhanced fuel efficiency, and superior durability, making them an ideal upgrade for a wide range of high-performance motorcycles. Each box contains 4 premium iridium spark plugs, ready to transform your ride.

Advanced Iridium IX Technology:

  • Extreme Ignitability: The fine wire iridium center electrode ensures a powerful, consistent spark every time.
  • Exceptional Anti-Fouling: Maintains clean operation for reliable performance over time.
  • Tapered Cut Ground Electrode: Improves starting, idling stability, and throttle response for a smoother ride.
  • Superior Durability: Iridium alloy is six times harder than platinum, offering extended plug life and resistance to wear.
  • High Melting Point: Iridium's extreme melting point makes it perfect for the demands of modern, high-performance engines.

Upgrade your Kawasaki Ninja ZX-11, ZX-6, ZX-7, ZX-9R, Suzuki GSX-R600, GSX-R750, GSX-R1100, Aprilia RSV4, or Arctic Cat Bearcat with the proven performance of NGK Iridium IX. For those seeking the absolute pinnacle of ignition technology, consider the NGK Ruthenium HX plug. Find your performance edge at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2010 Aprilia RSV4 Factory Base
2011 Aprilia RSV4 Factory SE Base
2010-2011 Aprilia RSV4 R Base
2006-2009 Aprilia Scarabeo 100 Base
2016-2019 Arctic Cat Bearcat 7000 XT Base
2017-2018 Arctic Cat Bearcat 7000 XT GS Base
2016 Arctic Cat M 7000 Limited 153 Base
2016 Arctic Cat M 7000 Limited 162 Base
2015-2016 Arctic Cat M 7000 Sno Pro 153 Base
2016 Arctic Cat M 7000 Sno Pro 162 Base
2015-2016 Arctic Cat Pantera 7000 Base
2018 Arctic Cat Pantera 7000 Base
2015-2019 Arctic Cat Pantera 7000 Limited Base
2016-2019 Arctic Cat Pantera 7000 XT Limited Base
2020 Arctic Cat Wildcat XX Base
2015 Arctic Cat XF 7000 Cross Country Base
2014 Arctic Cat XF 7000 Cross Country Sno Pro Base
2014-2018 Arctic Cat XF 7000 Crosstour Base
2016-2018 Arctic Cat XF 7000 Crosstrek Base
2015-2016 Arctic Cat XF 7000 High Country Base
2014-2015 Arctic Cat XF 7000 LXR Base
2014-2015 Arctic Cat XF 7000 Limited Base
2014-2015 Arctic Cat XF 7000 Sno Pro Base
2018 Arctic Cat ZR 7000 129 Base
2018-2019 Arctic Cat ZR 7000 137 Base
2015-2017 Arctic Cat ZR 7000 El Tigre Base
2014-2015 Arctic Cat ZR 7000 LXR Base
2016-2017 Arctic Cat ZR 7000 LXR 129 Base
2016-2017 Arctic Cat ZR 7000 LXR 137 Base
2014-2015 Arctic Cat ZR 7000 Limited Base
2016 Arctic Cat ZR 7000 Limited 129 Base
2016-2019 Arctic Cat ZR 7000 Limited 137 Base
2019 Arctic Cat ZR 7000 Limited 137 iACT Base
2015-2016 Arctic Cat ZR 7000 RR Base
2014-2015 Arctic Cat ZR 7000 Sno Pro Base
2016 Arctic Cat ZR 7000 Sno Pro 129 Base
2018 Arctic Cat ZR 7000 Sno Pro 129 Base
2016-2018 Arctic Cat ZR 7000 Sno Pro 137 Base
2002-2003 Cannondale Blaze 440 Base
2002 Cannondale C440R Base
2002-2003 Cannondale Cannibal 440 Base
2002 Cannondale E440 Base
2002 Cannondale Moto 440 Base
2002-2003 Cannondale Speed 440 Base
2002 Cannondale X440 Base
2004-2006 Ducati 749 Base
2005-2006 Ducati 749 Dark Base
2004-2005 Ducati 749R Base
2004-2006 Ducati 749S Base
2003 Ducati 998 Biposto Base
2004 Ducati 998 Matrix Base
2003 Ducati 998 Monoposto Base
2004-2007 Ducati ST3 Base
2018 Harley-Davidson FLDE Deluxe 107 Base
2018 Harley-Davidson FLFB Fat Boy 107 Base
2018 Harley-Davidson FLFBS Fat Boy 114 Base
2018 Harley-Davidson FLHC Heritage Classic 107 Base
2018 Harley-Davidson FLHCS Heritage Classic 114 Base
2017-2019 Harley-Davidson FLHR Road King Base
2017-2019 Harley-Davidson FLHRXS Road King Special Base

…and 230 additional fitments. Contact us to confirm yours.

Product Details

Product Description

About NGK

NGK engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full NGK lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

NGK IX Iridium Spark Plugs (CR9EIX) - Unleash Peak Performance

Designed for the true performance enthusiast, NGK IX Iridium Spark Plugs (CR9EIX) are engineered to deliver an unparalleled ignition experience. These plugs provide exceptional acceleration, enhanced fuel efficiency, and superior durability, making them an ideal upgrade for a wide range of high-performance motorcycles. Each box contains 4 premium iridium spark plugs, ready to transform your ride.

Advanced Iridium IX Technology:

  • Extreme Ignitability: The fine wire iridium center electrode ensures a powerful, consistent spark every time.
  • Exceptional Anti-Fouling: Maintains clean operation for reliable performance over time.
  • Tapered Cut Ground Electrode: Improves starting, idling stability, and throttle response for a smoother ride.
  • Superior Durability: Iridium alloy is six times harder than platinum, offering extended plug life and resistance to wear.
  • High Melting Point: Iridium's extreme melting point makes it perfect for the demands of modern, high-performance engines.

Upgrade your Kawasaki Ninja ZX-11, ZX-6, ZX-7, ZX-9R, Suzuki GSX-R600, GSX-R750, GSX-R1100, Aprilia RSV4, or Arctic Cat Bearcat with the proven performance of NGK Iridium IX. For those seeking the absolute pinnacle of ignition technology, consider the NGK Ruthenium HX plug. Find your performance edge at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2010 Aprilia RSV4 Factory Base
2011 Aprilia RSV4 Factory SE Base
2010-2011 Aprilia RSV4 R Base
2006-2009 Aprilia Scarabeo 100 Base
2016-2019 Arctic Cat Bearcat 7000 XT Base
2017-2018 Arctic Cat Bearcat 7000 XT GS Base
2016 Arctic Cat M 7000 Limited 153 Base
2016 Arctic Cat M 7000 Limited 162 Base
2015-2016 Arctic Cat M 7000 Sno Pro 153 Base
2016 Arctic Cat M 7000 Sno Pro 162 Base
2015-2016 Arctic Cat Pantera 7000 Base
2018 Arctic Cat Pantera 7000 Base
2015-2019 Arctic Cat Pantera 7000 Limited Base
2016-2019 Arctic Cat Pantera 7000 XT Limited Base
2020 Arctic Cat Wildcat XX Base
2015 Arctic Cat XF 7000 Cross Country Base
2014 Arctic Cat XF 7000 Cross Country Sno Pro Base
2014-2018 Arctic Cat XF 7000 Crosstour Base
2016-2018 Arctic Cat XF 7000 Crosstrek Base
2015-2016 Arctic Cat XF 7000 High Country Base
2014-2015 Arctic Cat XF 7000 LXR Base
2014-2015 Arctic Cat XF 7000 Limited Base
2014-2015 Arctic Cat XF 7000 Sno Pro Base
2018 Arctic Cat ZR 7000 129 Base
2018-2019 Arctic Cat ZR 7000 137 Base
2015-2017 Arctic Cat ZR 7000 El Tigre Base
2014-2015 Arctic Cat ZR 7000 LXR Base
2016-2017 Arctic Cat ZR 7000 LXR 129 Base
2016-2017 Arctic Cat ZR 7000 LXR 137 Base
2014-2015 Arctic Cat ZR 7000 Limited Base
2016 Arctic Cat ZR 7000 Limited 129 Base
2016-2019 Arctic Cat ZR 7000 Limited 137 Base
2019 Arctic Cat ZR 7000 Limited 137 iACT Base
2015-2016 Arctic Cat ZR 7000 RR Base
2014-2015 Arctic Cat ZR 7000 Sno Pro Base
2016 Arctic Cat ZR 7000 Sno Pro 129 Base
2018 Arctic Cat ZR 7000 Sno Pro 129 Base
2016-2018 Arctic Cat ZR 7000 Sno Pro 137 Base
2002-2003 Cannondale Blaze 440 Base
2002 Cannondale C440R Base
2002-2003 Cannondale Cannibal 440 Base
2002 Cannondale E440 Base
2002 Cannondale Moto 440 Base
2002-2003 Cannondale Speed 440 Base
2002 Cannondale X440 Base
2004-2006 Ducati 749 Base
2005-2006 Ducati 749 Dark Base
2004-2005 Ducati 749R Base
2004-2006 Ducati 749S Base
2003 Ducati 998 Biposto Base
2004 Ducati 998 Matrix Base
2003 Ducati 998 Monoposto Base
2004-2007 Ducati ST3 Base
2018 Harley-Davidson FLDE Deluxe 107 Base
2018 Harley-Davidson FLFB Fat Boy 107 Base
2018 Harley-Davidson FLFBS Fat Boy 114 Base
2018 Harley-Davidson FLHC Heritage Classic 107 Base
2018 Harley-Davidson FLHCS Heritage Classic 114 Base
2017-2019 Harley-Davidson FLHR Road King Base
2017-2019 Harley-Davidson FLHRXS Road King Special Base

…and 230 additional fitments. Contact us to confirm yours.

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