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  See more parts for Aprilia RSV4
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NGK IX Iridium Spark Plug Box of 4 (CR9EIX) - 3521
NGK IX Iridium Spark Plug Box of 4 (CR9EIX) - 3521 - Image 2 NGK IX Iridium Spark Plug Box of 4 (CR9EIX) - 3521 - Image 2
NGK IX Iridium Heat Range 9 Spark Plug (CR9EIX) 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 ignitibility and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response.

Features:
  • The Iridium fine wire center electrode's durability is six times harder than platinum.
  • Iridium alloys extremely high melting point is perfect for today's engines.
  • For even greater performance consider upgrading to a NGK RUTHENIUM HX™ plug.

Other Part Numbers:
NGK Spark Plugs #ngk3521
NGK Spark Plugs #CR9EIX

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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2010-2011
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2006-2009
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2020
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2002-2003
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2002
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2002-2003
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2002
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2002
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2002-2003
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2002
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2004-2006
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2003-2004
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2004-2007
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2018
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2018
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2018
 Harley Davidson FLFBS Fat Boy 114
2018
 Harley Davidson FLHC Heritage Classic 107
2018
 Harley Davidson FLHCS Heritage Classic 114
2017-2019
 Harley Davidson FLHR Road King
2017-2019
 Harley Davidson FLHRXS Road King Special
2017-2019
 Harley Davidson FLHTCU Electra Glide Ultra
2017-2019
 Harley Davidson FLHTCUTG Tri Glide Ultra
2017-2019
 Harley Davidson FLHTK Ultra Limited
2017-2019
 Harley Davidson FLHTKL Ultra Limited Low
2017-2019
 Harley Davidson FLHTKSE CVO Limited
2017-2019
 Harley Davidson FLHX Street Glide
2017-2019
 Harley Davidson FLHXS Street Glide Special
2017-2019
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2017-2019
 Harley Davidson FLRT Freewheeler
2018-2019
 Harley Davidson FLSB Sport Glide 107
2018-2019
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2017-2019
 Harley Davidson FLTRU Road Glide Ultra
2017-2019
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2017-2019
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2018-2019
 Harley Davidson FLTRXSE CVO Road Glide
2018-2019
 Harley Davidson FXBB Street Bob 107
2018-2019
 Harley Davidson FXBR Breakout 107
2018-2019
 Harley Davidson FXBRS Breakout 114
2019
 Harley Davidson FXDRS FXDR 114
2018-2019
 Harley Davidson FXFB Fat Bob 107
2018-2019
 Harley Davidson FXFBS Fat Bob 114
2018-2019
 Harley Davidson FXLR Low Rider 107
2015-2019
 Harley Davidson XG500 Street 500
2015-2019
 Harley Davidson XG750 Street 750
2018-2019
 Harley Davidson XG750A Street Rod
2009-2011
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2009-2012
 Husqvarna TE250
2012
 Husqvarna TE310
2010-2012
 Husqvarna TXC 250
2012
 Husqvarna TXC 310
2013
 KTM 250 SX-F
1995-1997
 Kawasaki GPZ
1990-1997
 Kawasaki Ninja 600R
1990-2001
 Kawasaki Ninja ZX-11
2001-2005
 Kawasaki Ninja ZX-12R
1990-2002
 Kawasaki Ninja ZX-6
1995-2002, 2007-2012
 Kawasaki Ninja ZX-6R
2003-2005
 Kawasaki Ninja ZX6-RR
2005-2006
 Kawasaki Z750S
1993
 Kawasaki ZR1100
2016
 Kawasaki ZR800 Z800
1999-2000
 Kawasaki ZRX1100
2001-2005
 Kawasaki ZRX1200
2003-2006, 2013-2019
 Kawasaki ZX636 Ninja ZX-6R
1991-1995
 Kawasaki ZX750 Ninja ZX-7
1991-1995
 Kawasaki ZX750 Ninja ZX-7R
1994-2003
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2003-2008
 Kawasaki ZZR 600
2002-2005
 Kawasaki ZZR1200
2013
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2012-2013
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2012-2013
 MV Agusta Brutale 1090 RR
2007
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2010-2011
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2006
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2000-2002
 MV Agusta F4-S
2007-2009
 Piaggio MP3 250
2013-2014
 Polaris Ranger 900
2012-2013
 Polaris Ranger RZR 570
2011-2013
 Polaris Ranger RZR XP 900
2001-2007
 Suzuki DR-Z250
1994-1999
 Suzuki DR350
1994-1999
 Suzuki DR350SE
1996-2003
 Suzuki GSF600S Bandit
2001-2006
 Suzuki GSX-R1000
1993-1998
 Suzuki GSX-R1100
1992-1993, 1997-2007
 Suzuki GSX-R600
1993-2009
 Suzuki GSX-R750
1999-2007
 Suzuki GSX1300R Hayabusa
1996-2006
 Suzuki GSX600F Katana
1999-2006
 Suzuki GSX750F Katana
1994-1996
 Suzuki RF600
1994-1997
 Suzuki RF900
1998-2003
 Suzuki TL1000R
1997-2001
 Suzuki TL1000S
2018
 Textron Wildcat XX
2003-2004
 Triumph Daytona 600
2005
 Triumph Daytona 650
2006-2016
 Triumph Daytona 675
2002-2004
 Triumph Daytona 955i
2002-2005
 Triumph Speed Four
2002-2004, 2007-2008
 Triumph Speed Triple
2002-2004
 Triumph Sprint RS
2002-2010
 Triumph Sprint ST
2014-2016
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2000-2003
 Triumph TT600
2007-2010
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2011-2014
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2011-2016
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2016-2017
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2015-2017
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2015-2017
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2014
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2014
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2014
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1999-2006
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2008-2019
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2008-2011
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2016-2019
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2017-2019
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2017-2019
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2012-2013
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1998-2001, 2004-2008
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2006
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1995-2007
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1994, 1996-1998
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Who is NGK?

NGK is an automotive parts company that was founded in 1936. The company has been in the automotive industry for more than 80 years and they specialize in creating original factory parts to aftermarket automotive parts for a variety of vehicles. Today, the company is widely recognized as the industry leader when it comes to ignition system parts and is trusted by enthusiasts and professional mechanics all over the world.

Reaching the Far Corners of the Globe

NGK has become a global brand is practically visible all over the globe. They have facilities based in the USA, Mexico, Canada, the United Kingdom, Finland, France, Germany, Italy, Poland, Russia, Spain, Turkey, South Africa, and Brazil.

The company utilizes the industry's most advanced manufacturing facility. It houses hi-tech tools that help them create parts that are accurate and precise.

Due to their reputation as a company that provides top quality products, automotive companies have partnered with them to be the leading ignition system supplier. The company's drive to continuously innovate itself and its products has helped the automotive industry move forward.

Purchase NGK at Vivid Racing

If you are in search of high-quality spark plugs, oxygen sensors, and high tension wires that would not leave you hanging on the road, then NGK is the brand for you. With decades of experience under them their belts, you know that they are a company that you could put your trust into. Visit Vivid Racing and check out all their list of products that will fit your specific needs and vehicles.






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