Description

NGK Iridium IX Spark Plugs

Ultimate Performance! Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling.

• Fine Iridium tip ensures high durability and a consistently stable spark
• Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
• Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
• The ultimate in the evolution of spark plug technology and performance from the industry leader
• The iridium electrode is 25% smaller than a platinum electrode, and it’s just 1/4 the size of a conventional nickel electrode
• Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life

Sold as a set! Twin Cam & XL include 2, M8 includes 4.

Benefits of Iridium Spark Plugs

• Lower fuel consumption
• Longer Life
• Smoother Idle
• Improved ignition efficiency enhancing power and acceleration

Fitment Guide:

17-22 M8 fits:

99-17 Twin Cam fits:

1999-2003 Harley-Davidson Road Glide EFI FLTR – –
2001-2002 Harley-Davidson Softail Standard EFI FXSTI – –
2010-2016 Harley-Davidson Electra Glide Ultra Limited FLHTK – –
2013-2015 Harley-Davidson Breakout FXSB – –
2012-2016 Harley-Davidson Softail Slim FLS – –
2000-2006 Harley-Davidson Softail Deuce FXSTD – –
2008-2011 Harley-Davidson Softail Cross Bones FLSTSB – –
1999-2003 Harley-Davidson Road King Classic EFI FLHRC – –
2006 Harley-Davidson Super Glide FXD35 – –
2001-2003 Harley-Davidson Softail Heritage Classic EFI FLSTCI – –
2005-2006 Harley-Davidson Softail Deluxe EFI FLSTNI – –
1999-2003 Harley-Davidson Electra Glide Classic FLHTC – –
2005-2007 Harley-Davidson Softail Springer Classic EFI FLSTSCI – –
2004-2006 Harley-Davidson Road King Custom EFI FLHRS – –
1999-2005 Harley-Davidson Super Glide Sport FXDX – –
2004-2005 Harley-Davidson Super Glide EFI FXDI – –
2005-2006 Harley-Davidson Softail Deluxe FLSTN – –
1999-2003 Harley-Davidson Road King FLHR – –
2008-2011 Harley-Davidson Softail Rocker C FXCWC – –
1999-2002 Harley-Davidson Road Glide FLTR – –
2001-2002 Harley-Davidson Softail Heritage Springer EFI FLSTSI – –
2012-2016 Harley-Davidson Switchback FLD – –
2008-2016 Harley-Davidson Fat Bob FXDF – –
2006 Harley-Davidson Street Bob FXDB – –
2001-2002 Harley-Davidson Softail Night Train EFI FXSTBI – –
2014-2016 Harley-Davidson Street Glide Special FLHXS – –
2015-2016 Harley-Davidson Freewheeler FLRT – –
2009-2016 Harley-Davidson Tri Glide Ultra Classic FLHTCUTG – –
2002-2003 Harley-Davidson Electra Glide Classic EFI FLHTCI – –
2001-2006 Harley-Davidson Softail Deuce EFI FXSTDI – –
1999-2001 Harley-Davidson Road King EFI FLHR – –
2010-2013 Harley-Davidson Road Glide Custom FLTRX – –
2005 Harley-Davidson Super Glide Custom FXDC – –
2011 Harley-Davidson Blackline FXS – –
2006 Harley-Davidson Street Glide EFI FLHX – –
2004-2005 Harley-Davidson Super Glide Sport EFI FXDXI – –
2004-2006 Harley-Davidson Road King Custom FLHRS – –
2015-2016 Harley-Davidson Electra Glide Ultra Classic Low FLHTCUL – –
2015-2016 Harley-Davidson Electra Glide Ultra Limited Low FLHTKL – –
2011-2013 Harley-Davidson Road Glide Ultra FLTRU – –
2001-2002 Harley-Davidson Softail Springer EFI FXSTSI – –
2010 Harley-Davidson Street Glide Trike FLHXXX – –
2003 Harley-Davidson Electra Glide Standard EFI FLHTI – –
2010-2011 Harley-Davidson Fat Boy Lo FLSTFB – –
2015-2016 Harley-Davidson Road Glide Special FLTRXS – –
2005-2006 Harley-Davidson Softail Springer Classic FLSTSC – –
1999-2003 Harley-Davidson Electra Glide Standard FLHT – –
2016 Harley-Davidson Softail Slim S FLSS – –
1999 Harley-Davidson Electra Glide Ultra Classic FLHTCU – –
2006 Harley-Davidson Street Glide FLHX – –
2008-2009 Harley-Davidson Softail Rocker FXCW – –
2016 Harley-Davidson Fat Boy S FLSTFBS – –
2006 Harley-Davidson Softail Heritage EFI FLSTI – –
2005 Harley-Davidson 15th Anniversary Fat Boy FLSTF – –
2005 Harley-Davidson Super Glide Custom EFI FXDCI – –
2004-2006 Harley-Davidson Electra Glide Standard FLHT – –
2004-2006 Harley-Davidson Road King Classic EFI FLHRC – –
2007 Harley-Davidson Road King Custom EFI FLHRS – –
2000-2002 Harley-Davidson Softail Springer FXSTS – –
2002-2005 Harley-Davidson Wide Glide FXDWG – –
1999-2001 Harley-Davidson Wide Glide FXDWG – –
2003-2005 Harley-Davidson Softail Night Train EFI FXSTBI – –
2003-2005 Harley-Davidson Softail Springer FXSTS – –
2007-2008 Harley-Davidson Road Glide EFI FLTR – –
2007-2008 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI – –
2007 Harley-Davidson Super Glide Custom EFI FXDCI – –
2002-2005 Harley-Davidson Low Rider FXDL – –
1999-2001 Harley-Davidson Low Rider FXDL – –
2009 Harley-Davidson Street Glide EFI FLHX – –
2011 Harley-Davidson Street Glide Trike FLHXXX – –
2007-2010 Harley-Davidson Softail Custom EFI FXSTC – –
2002-2005 Harley-Davidson Super Glide FXD – –
1999-2000 Harley-Davidson Dyna Convertible FXDS-CONV – –
2003-2005 Harley-Davidson Softail Night Train FXSTB – –
2006 Harley-Davidson Softail Night Train EFI FXSTBI – –
2004-2006 Harley-Davidson Electra Glide Classic EFI FLHTCI – –
1999-2001 Harley-Davidson Super Glide FXD – –
2000-2002 Harley-Davidson Softail Night Train FXSTB – –
2007 Harley-Davidson Super Glide EFI FXDI – –
2004-2005 Harley-Davidson Electra Glide Classic FLHTC – –
2003-2005 Harley-Davidson Softail Springer EFI FXSTSI – –
2008-2010 Harley-Davidson Super Glide EFI FXDI – –
2007 Harley-Davidson Wide Glide EFI FXDWGI – –
2006 Harley-Davidson Softail Standard FXST – –
2006 Harley-Davidson Softail Springer EFI FXSTSI – –
2003-2005 Harley-Davidson Softail Standard FXST – –
2010-2013 Harley-Davidson Street Glide EFI FLHX – –
2007-2008 Harley-Davidson Street Glide EFI FLHX – –
2007-2008 Harley-Davidson Road King EFI FLHR – –
2004-2006 Harley-Davidson Road King FLHR – –
2000-2002 Harley-Davidson Softail Standard FXST – –
2007-2009 Harley-Davidson Softail Night Train EFI FXSTBI – –
2003-2005 Harley-Davidson Softail Standard EFI FXSTI – –
2006 Harley-Davidson Softail Springer FXSTS – –
2006 Harley-Davidson Softail Night Train FXSTB – –
2008 Harley-Davidson Wide Glide EFI FXDWGI – –
2008-2016 Harley-Davidson Street Bob FXDB – –
2007 Harley-Davidson Street Bob FXDB – –
2008-2014 Harley-Davidson Super Glide Custom EFI FXDCI – –
2006 Harley-Davidson Softail Standard EFI FXSTI – –
2009-2016 Harley-Davidson Road King EFI FLHR – –
2009-2016 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI – –
2012-2016 Harley-Davidson Wide Glide EFI FXDWGI – –
2010-2011 Harley-Davidson Wide Glide EFI FXDWGI – –
2009 Harley-Davidson Road Glide EFI FLTR – –
2012-2013 Harley-Davidson Blackline FXS – –
2006 Harley-Davidson Super Glide EFI FXDI – –
2007-2011 Harley-Davidson Softail Fat Boy EFI FLSTFI – –
2004-2006 Harley-Davidson Softail Heritage Classic FLSTC – –
2007-2011 Harley-Davidson Softail Heritage Classic EFI FLSTCI – –
2007-2011 Harley-Davidson Softail Deluxe EFI FLSTNI – –
2000-2003 Harley-Davidson Softail Heritage Classic FLSTC – –
2006 Harley-Davidson Softail Heritage FLST – –
2012-2016 Harley-Davidson Softail Deluxe EFI FLSTNI – –
2007 Harley-Davidson Softail Deuce EFI FXSTDI – –
2012-2016 Harley-Davidson Softail Fat Boy EFI FLSTFI – –
2004-2006 Harley-Davidson Softail Fat Boy FLSTF – –
2000-2003 Harley-Davidson Softail Fat Boy FLSTF – –
2003 Harley-Davidson Softail Heritage Springer EFI FLSTSI – –
2000-2002 Harley-Davidson Softail Heritage Springer FLSTS – –
2003 Harley-Davidson Softail Heritage Springer FLSTS – –
2012-2016 Harley-Davidson Softail Heritage Classic EFI FLSTCI – –
2012-2016 Harley-Davidson Fat Boy Lo FLSTFB – –
2007 Harley-Davidson Low Rider EFI FXDL – –
2008-2009, 2015-2016 Harley-Davidson Low Rider EFI FXDL – –
2006 Harley-Davidson Wide Glide EFI FXDWGI – –
2004-2005 Harley-Davidson Wide Glide EFI FXDWGI – –
2004-2006 Harley-Davidson Softail Heritage Classic EFI FLSTCI – –
2014-2016 Harley-Davidson Street Glide EFI FLHX – –
2004-2006 Harley-Davidson Softail Fat Boy EFI FLSTFI – –
2002-2003 Harley-Davidson Softail Fat Boy EFI FLSTFI – –
2015-2016 Harley-Davidson Road Glide Custom FLTRX – –
2016 Harley-Davidson Road Glide Ultra FLTRU – –
2007-2008 Harley-Davidson Electra Glide Classic EFI FLHTCI – –
2009-2013 Harley-Davidson Electra Glide Classic EFI FLHTCI – –
2016 Harley-Davidson Breakout FXSB – –
2004-2006 Harley-Davidson Electra Glide Standard EFI FLHTI – –
2006 Harley-Davidson Super Glide Custom EFI FXDCI – –
2004-2006 Harley-Davidson Road Glide EFI FLTR – –
2007 Harley-Davidson Softail Standard EFI FXSTI

86-20 XL fits:

2014-2016 Harley-Davidson SuperLow 1200 XLT – –
1986-1987 Harley-Davidson Sportster 1100 XLH – –
2007-2012 Harley-Davidson 1200 Nightster XLN – –
2011-2016 Harley-Davidson 883 SuperLow XLL – –
1986-1990 Harley-Davidson 883 Deluxe XLH – –
2012-2016 Harley-Davidson Sportster Seventy-Two XLV – –
1987-1990 Harley-Davidson 883 Hugger XLH – –
2006 Harley-Davidson 1200 Low XLL – –
1988-1990 Harley-Davidson Sportster 1200 XLH – –
1986-1990 Harley-Davidson Sportster 883 XLH – –
2010-2016 Harley-Davidson Sportster Forty-Eight XLX – –
1996 Harley-Davidson 1200 Custom XLC – –
1996-2003 Harley-Davidson 1200 Sport XLS – –
1999-2003 Harley-Davidson 883 Custom XLC – –
2004-2006 Harley-Davidson 883 XL – –
2005-2006 Harley-Davidson 883 Low XLL – –
2009-2016 Harley-Davidson Iron 883 XLN – –
2002-2003 Harley-Davidson 883 Roadster XLR – –
2004-2006 Harley-Davidson 1200 Roadster XLR – –
2007 Harley-Davidson Sportster 1200 XL 50 – –
1992-1996 Harley-Davidson 883 Hugger XLH – –
2005-2006 Harley-Davidson 883 Roadster XLR – –
1997-2003 Harley-Davidson 883 Hugger XLH – –
1991 Harley-Davidson 883 Hugger XLH – –
2004-2006 Harley-Davidson 1200 Custom XLC – –
1997-2003 Harley-Davidson Sportster 883 XLH – –
2004-2006 Harley-Davidson 883 Custom XLC – –
2007-2010 Harley-Davidson 1200 Custom EFI XLC – –
1997-2003 Harley-Davidson 1200 Custom XLC – –
2007-2010 Harley-Davidson 883 Low EFI XLL – –
2007-2011 Harley-Davidson 1200 Low EFI XLL – –
2007-2008 Harley-Davidson 1200 Roadster EFI XLR – –
1991-2003 Harley-Davidson Sportster 1200 XLH – –
2011-2016 Harley-Davidson 1200 Custom EFI XLC – –
2007-2009 Harley-Davidson 883 Custom EFI XLC – –
1992-1995 Harley-Davidson 883 Deluxe XLH – –
1992-1996 Harley-Davidson Sportster 883 XLH – –
1991 Harley-Davidson 883 Deluxe XLH – –
1991 Harley-Davidson Sportster 883 XLH – –
2006 Harley-Davidson 1200 Low EFI XLL – –
2007-2008 Harley-Davidson 883 EFI XL – –
2007 Harley-Davidson 883 Roadster EFI XLR

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