Iridium Spark Plugs — 12 mm thread, 17.5 mm reach, 16 mm (5/8") hex, pair

DRAG SPECIALTIES Iridium Spark Plugs — 12 mm thread, 17.5 mm reach, 16 mm (5/8") hex, pair – 99-17 Dyna, 99-07, 10-11, 16 Touring, 05, 07, 09-17 CVO, 10 Trike, 00-17 Softail, 85-04, 06, 08-16, 18-22 Sportster

DRAG SPECIALTIES
2103-0231
E18-6655IDS
Ultra-fine iridium electrode for hotter spark and longer service life; black ceramic with red lettering and corrosion-resistant shell.
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Iridium Spark Plugs deliver precise ignition performance thanks to an ultra-fine iridium center electrode. ⚡

The smaller electrode requires less voltage, producing a hotter spark and extending service life compared to conventional plugs. These plugs feature black ceramic insulators with red lettering and a gold-colored, corrosion-resistant coating on the metal shell. 🛡️

Manufactured to exceed OEM specifications, they provide reliable starts, improved throttle response, and longer intervals between replacements.

: 2103-0231
In Stock

Data sheet

Type
Resistor
Units
Pair
Style
Iridium
Brand
DRAG SPECIALTIES
Thread Size
12 mm
Center Electrode Type
Necked Down
Electrode Tip Material
Iridium
Ground Electrode Shape
Standard
Ground Electrode Configuration
Single
Heat Range
7
Terminal Configuration
Removable Nut
Center Electrode Projection
Projected
Hex Size
16 mm (5/8")
Thread Reach
17.5 mm (11/16")
Harley Family
CVO
Dyna
Softail
Sportster
Touring
Trike

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Dyna Switchback Dyna 2012
Harley Davidson Dyna Switchback Dyna 2014
Harley Davidson Road King Touring 2007
Harley Davidson Road King Classic Touring 2016
Harley Davidson Road King Classic Touring 1999
Harley Davidson Road King Classic Touring 2000
Harley Davidson Road King Classic Touring 2001
Harley Davidson Road King Classic Touring 2002
Harley Davidson Road King Touring 1999
Harley Davidson Road King Touring 2003
Harley Davidson Road King Touring 2006
Harley Davidson Road King Custom Touring 2005
Harley Davidson Road King Custom Touring 2007
Harley Davidson Road King CVO 110th Anniversary CVO 2013
Harley Davidson Road King Custom Touring 2006
Harley Davidson Electra Glide Touring 2000
Harley Davidson Electra Glide Touring 2002
Harley Davidson Electra Glide Touring 2003
Harley Davidson Electra Glide Touring 2005
Harley Davidson Electra Glide Touring 2010
Harley Davidson Electra Glide Classic Touring 2002
Harley Davidson Electra Glide Classic Touring 2004
Harley Davidson Electra Glide Classic Touring 2007
Harley Davidson Electra Glide Classic Touring 1999
Harley Davidson Electra Glide Classic Touring 2000
Harley Davidson Electra Glide Classic Touring 2004
Harley Davidson Electra Glide Screamin Eagle CVO 2005
Harley Davidson Electra Glide Ultra Classic Touring 2001
Harley Davidson Electra Glide Ultra Classic Touring 2005
Harley Davidson Electra Glide Ultra Classic Touring 2006
Harley Davidson Electra Glide Ultra Classic Screamin Eagle CVO 2007
Harley Davidson Electra Glide Ultra Classic CVO CVO 2010
Harley Davidson Electra Glide Ultra Classic CVO CVO 2012
Harley Davidson Trike Tri Glide Ultra Classic Trike 2010
Harley Davidson Electra Glide Touring 2005
Harley Davidson Electra Glide Ultra Limited CVO CVO 2014
Harley Davidson Street Glide Touring 2007
Harley Davidson Trike Street Glide Touring 2011
Harley Davidson Softail Slim Softail 2014
Harley Davidson Softail Slim Softail 2012
Harley Davidson Softail Slim Softail 2013
Harley Davidson Softail Slim Softail 2014
Harley Davidson Heritage Softail Classic Softail 2007
Harley Davidson Heritage Softail Classic Softail 2011
Harley Davidson Heritage Softail Classic Softail 2012
Harley Davidson Heritage Softail Classic 110th Anniversary Softail 2013
Harley Davidson Heritage Softail Classic Softail 2015
Harley Davidson Heritage Softail Classic Softail 2001
Harley Davidson Heritage Softail Classic Softail 2003
Harley Davidson Heritage Softail Classic Softail 2005
Harley Davidson Fat Boy Softail 2000
Harley Davidson Fat Boy Softail 2001
Harley Davidson Fat Boy Softail 2002
Harley Davidson Fat Boy Softail 2008
Harley Davidson Fat Boy Softail 2011
Harley Davidson Fat Boy Softail 2012
Harley Davidson Fat Boy Softail 2014
Harley Davidson Fat Boy Softail 2012
Harley Davidson Fat Boy Softail 2013
Harley Davidson Fat Boy Lo Softail 2010
Harley Davidson Fat Boy Lo Softail 2011
Harley Davidson Fat Boy Special Softail 2011
Harley Davidson Fat Boy Lo Softail 2013
Harley Davidson Fat Boy Lo Softail 2013
Harley Davidson Fat Boy Lo Softail 2014
Harley Davidson Fat Boy Lo Softail 2015
Harley Davidson Fat Boy Softail 2001
Harley Davidson Fat Boy Softail 2003
Harley Davidson Fat Boy Softail 2004
Harley Davidson Fat Boy Softail 2006
Harley Davidson Heritage Softail Softail 2006
Harley Davidson Softail Deluxe Softail 2006
Harley Davidson Softail Deluxe Softail 2008
Harley Davidson Softail Deluxe Softail 2011
Harley Davidson Softail Deluxe Softail 2012
Harley Davidson Softail Deluxe Softail 2013
Harley Davidson Softail Deluxe Softail 2015
Harley Davidson Softail Deluxe Softail 2016
Harley Davidson Softail Deluxe Softail 2017
Harley Davidson Heritage Softail Springer Softail 2000
Harley Davidson Heritage Softail Springer Softail 2002
Harley Davidson Heritage Softail Springer Softail 2003
Harley Davidson Cross Bones Springer Softail 2008
Harley Davidson Cross Bones Springer Softail 2011
Harley Davidson Softail Springer Classic Softail 2005
Harley Davidson Softail Springer Classic Softail 2006
Harley Davidson Road Glide Touring 2007
Harley Davidson Road Glide Touring 2010
Harley Davidson Road Glide Touring 2000
Harley Davidson Road Glide Touring 2001
Harley Davidson Road Glide Touring 2003
Harley Davidson Road Glide Touring 2004
Harley Davidson Road Glide Touring 2005
Harley Davidson Road Glide CVO CVO 2009
Harley Davidson Road Glide Ultra CVO CVO 2011
Harley Davidson Road Glide Ultra CVO CVO 2015
Harley Davidson Road Glide Ultra CVO CVO 2016
Harley Davidson Road Glide Custom CVO CVO 2013
Harley Davidson Dyna Super Glide Dyna 1999
Harley Davidson Dyna Super Glide Dyna 2000
Harley Davidson Dyna Super Glide Dyna 2001
Harley Davidson Dyna Super Glide Dyna 2003
Harley Davidson Dyna Super Glide Dyna 2004
Harley Davidson Dyna Super Glide Dyna 2005
Harley Davidson Dyna Super Glide Dyna 2007
Harley Davidson Dyna Super Glide Dyna 2008
Harley Davidson Dyna Super Glide Dyna 2009
Harley Davidson Dyna Super Glide Dyna 2010
Harley Davidson Dyna Street Bob Dyna 2007
Harley Davidson Dyna Street Bob Dyna 2009
Harley Davidson Dyna Street Bob Dyna 2010
Harley Davidson Dyna Street Bob Dyna 2011
Harley Davidson Dyna Street Bob Dyna 2012
Harley Davidson Dyna Street Bob Dyna 2013
Harley Davidson Dyna Street Bob Dyna 2012
Harley Davidson Dyna Street Bob Dyna 2013
Harley Davidson Dyna Street Bob Dyna 2014
Harley Davidson Dyna Street Bob Dyna 2015
Harley Davidson Dyna Street Bob Dyna 2016
Harley Davidson Dyna Street Bob Dyna 2017
Harley Davidson Dyna Street Bob Dyna 2015
Harley Davidson Dyna Super Glide Custom Dyna 2007
Harley Davidson Dyna Super Glide Custom Dyna 2008
Harley Davidson Dyna Super Glide Custom Dyna 2009
Harley Davidson Dyna Super Glide Custom Dyna 2011
Harley Davidson Dyna Super Glide Custom Dyna 2012
Harley Davidson Dyna Super Glide Custom Dyna 2013
Harley Davidson Dyna Super Glide Custom Dyna 2014
Harley Davidson Dyna Super Glide Custom Dyna 2006
Harley Davidson Dyna Fat Bob Dyna 2008
Harley Davidson Dyna Fat Bob Dyna 2009
Harley Davidson Dyna Fat Bob Dyna 2010
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2013
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2013
Harley Davidson Dyna Fat Bob Dyna 2016
Harley Davidson Dyna Super Glide Dyna 2004
Harley Davidson Dyna Super Glide Dyna 2005
Harley Davidson Dyna Super Glide Dyna 2006
Harley Davidson Dyna Low Rider Dyna 2000
Harley Davidson Dyna Low Rider Dyna 2001
Harley Davidson Dyna Low Rider Dyna 2002
Harley Davidson Dyna Low Rider Dyna 2004
Harley Davidson Dyna Low Rider Dyna 2005
Harley Davidson Dyna Low Rider Dyna 2007
Harley Davidson Dyna Low Rider Dyna 2009
Harley Davidson Dyna Low Rider Dyna 2017
Harley Davidson Dyna Low Rider Dyna 2004
Harley Davidson Dyna Low Rider Dyna 2005
Harley Davidson Dyna Wide Glide Dyna 2000
Harley Davidson Dyna Wide Glide Dyna 2005
Harley Davidson Dyna Wide Glide Dyna 2007
Harley Davidson Dyna Wide Glide Dyna 2010
Harley Davidson Dyna Wide Glide Dyna 2012
Harley Davidson Dyna Wide Glide Dyna 2014
Harley Davidson Dyna Wide Glide Dyna 2015
Harley Davidson Dyna Wide Glide Dyna 2004
Harley Davidson Dyna Wide Glide Dyna 2005
Harley Davidson Dyna Super Glide Sport Dyna 1999
Harley Davidson Dyna Super Glide Sport Dyna 2000
Harley Davidson Dyna Super Glide Sport Dyna 2002
Harley Davidson Dyna Super Glide Sport Dyna 2003
Harley Davidson Dyna Super Glide T-Sport Dyna 2001
Harley Davidson Dyna Super Glide T-Sport Dyna 2002
Harley Davidson Dyna Super Glide T-Sport Dyna 2003
Harley Davidson Breakout CVO CVO 2014
Harley Davidson Pro Street Breakout CVO CVO 2016
Harley Davidson Pro Street Breakout CVO CVO 2017
Harley Davidson Softail Softail 2000
Harley Davidson Softail Softail 2001
Harley Davidson Softail Softail 2002
Harley Davidson Softail Softail 2004
Harley Davidson Softail Softail 2005
Harley Davidson Softail Softail 2006
Harley Davidson Softail Softail 2007
Harley Davidson Softail Standard Softail 2009
Harley Davidson Softail Standard Softail 2010
Harley Davidson Softail Standard Softail 2011
Harley Davidson Softail Standard Softail 2012
Harley Davidson Softail Standard Softail 2013
Harley Davidson Softail Standard Softail 2014
Harley Davidson Softail Standard Softail 2015
Harley Davidson Softail Night Train Softail 2001
Harley Davidson Softail Night Train Softail 2005
Harley Davidson Softail Night Train Softail 2007
Harley Davidson Softail Night Train Softail 2008
Harley Davidson Softail Night Train Softail 2003
Harley Davidson Softail Custom Softail 2009
Harley Davidson Softail Custom Softail 2010
Harley Davidson Softail Deuce Softail 2000
Harley Davidson Softail Deuce Softail 2002
Harley Davidson Softail Deuce Softail 2004
Harley Davidson Softail Deuce Softail 2005
Harley Davidson Softail Deuce Softail 2002
Harley Davidson Softail Deuce Softail 2003
Harley Davidson Softail Deuce Softail 2006
Harley Davidson Softail Softail 2003
Harley Davidson Softail Softail 2004
Harley Davidson Softail Springer Softail 2000
Harley Davidson Softail Springer Softail 2001
Harley Davidson Softail Springer Softail 2002
Harley Davidson Softail Springer Softail 2003
Harley Davidson Softail Springer Softail 2003
Harley Davidson Sportster Custom Sportster 2020
Harley Davidson Sportster Custom Sportster 2020
Harley Davidson Sportster Custom LE A Sportster 2014
Harley Davidson Sportster Custom LE A Sportster 2015
Harley Davidson Sportster Custom LE A Sportster 2016
Harley Davidson Sportster Custom LE B Sportster 2014
Harley Davidson Sportster Custom LE B Sportster 2015
Harley Davidson Sportster Roadster Sportster 2020
Harley Davidson Sportster Roadster Sportster 2019
Harley Davidson Sportster Roadster Sportster 2020
Harley Davidson Low Sportster 2006
Harley Davidson Sportster Iron Sportster 2018
Harley Davidson Sportster Iron Sportster 2019
Harley Davidson Sportster Iron Sportster 2020
Harley Davidson Sportster Iron Sportster 2021
Harley Davidson Sport Sportster 1997
Harley Davidson Sport Sportster 1998
Harley Davidson Sportster Superlow Sportster 2018
Harley Davidson Sportster Superlow Sportster 2019
Harley Davidson Sportster Superlow Sportster 2018
Harley Davidson Sportster Superlow Sportster 2019
Harley Davidson Sportster Superlow Sportster 2020
Harley Davidson Sportster Forty-Eight Sportster 2022
Harley Davidson Sportster Forty-Eight Sportster 2021
Harley Davidson Sportster Forty-Eight Special Sportster 2018
Harley Davidson Sportster Forty-Eight Special Sportster 2019
Harley Davidson Sportster Forty-Eight Special Sportster 2020
Harley Davidson Sportster Sportster 1986
Harley Davidson Sportster Sportster 1987
Harley Davidson Sportster Sportster 1988
Harley Davidson Sportster Sportster 1989
Harley Davidson Sportster Sportster 1990
Harley Davidson Sportster Sportster 1991
Harley Davidson Sportster Sportster 1992
Harley Davidson Sportster Sportster 1993
Harley Davidson Sportster Sportster 1994
Harley Davidson Sportster Sportster 1995
Harley Davidson Sportster Sportster 1996
Harley Davidson Sportster Sportster 1997
Harley Davidson Sportster Sportster 1998
Harley Davidson Sportster Sportster 1999
Harley Davidson Sportster Sportster 2000
Harley Davidson Sportster Sportster 2001
Harley Davidson Sportster Sportster 2002
Harley Davidson Sportster Sportster 2003
Harley Davidson Sportster Sportster 2004
Harley Davidson Sportster 53 Custom Sportster 1998
Harley Davidson Sportster SuperLow Sportster 2020
Harley Davidson Sportster SuperLow Sportster 2020
Harley Davidson Roadster Sportster 2004
Harley Davidson Roadster Sportster 2008
Harley Davidson Roadster Sportster 2009
Harley Davidson Roadster Sportster 2010
Harley Davidson Roadster Sportster 2011
Harley Davidson Roadster Sportster 2012
Harley Davidson Roadster Sportster 2013
Harley Davidson Roadster Sportster 2014
Harley Davidson Roadster Sportster 2015
Harley Davidson Sportster Sportster 1986
Harley Davidson Sportster Sportster 1987
Harley Davidson Sportster Sportster 1988
Harley Davidson Sportster Sportster 1989
Harley Davidson Sportster Sportster 1990
Harley Davidson Sportster Sportster 1991
Harley Davidson Sportster Sportster 1992
Harley Davidson Sportster Sportster 1994
Harley Davidson Sportster Sportster 1986
Harley Davidson Sportster Sportster 1987
Harley Davidson Sportster Hugger Sportster 1988
Harley Davidson Sportster Hugger Sportster 1989
Harley Davidson Sportster Sportster 1990
Harley Davidson Sportster Deluxe Sportster 1991
Harley Davidson Sportster Sportster 1993
Harley Davidson Sportster Deluxe Sportster 1994
Harley Davidson Sportster Deluxe Sportster 1995
Harley Davidson Sportster Sportster 1997
Harley Davidson Sportster Sportster 1998
Harley Davidson Sportster 1985
Harley Davidson Sportster 2008
Harley Davidson Sportster 2009
Harley Davidson Sportster 2010
Harley Davidson Sportster 2011
Harley Davidson Sportster 2012
Harley Davidson Sportster 2013