NGK Iridium IX Spark Plugs

Sold as a set!

• Twin Cam & XL include 2
• M8 includes 4

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

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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