Iridium Spark Plug — 14 mm thread, 19.1 mm reach, 1.1 mm gap, heat range 20

DENSO Iridium Spark Plug — 14 mm thread, 19.1 mm reach, 1.1 mm gap, heat range 20 – 84 Sportster

DENSO
IW20
IW20
High-performance iridium spark plug for improved ignition, longer life, and consistent starts.
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Iridium spark plugs deliver long life and reliable ignition for both high-performance and everyday engines. 🔥

  • Six times harder than platinum, iridium withstands temperatures up to 4,000°F.
  • Because the iridium electrodes can be shrunk to only 0.4 mm, voltage requirements decrease while firing performance improves.
  • 360° laser welding of the electrode provides a seal that resists wear even in the worst conditions.
  • The ground electrode’s tapered cut and U-groove form a large-volume area for the flame’s center.

Expect consistent starts, improved throttle response, and extended service intervals. ⚡

: IW20
In Stock

Data sheet

Type
Resistor
Units
Each
Style
Iridium
Brand
DENSO
Thread Size
14 mm
Electrical Resistance
5k Ohms
Center Electrode Type
Fine Wire
Electrode Tip Material
Iridium
Ground Electrode Shape
Taper Cut, Grooved
Heat Range
20
Terminal Configuration
Threaded Stud
Center Electrode Projection
Non-Projected
Spark Gap
0.043"
1.1 mm
1.1 mm (0.043")
Hex Size
20.6 mm (13/16")
Thread Reach
19,1 mm (3/4")
Harley Family
Sportster

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

Manufacturer Model Family Year Notes
ARCTIC CAT F 2006
ARCTIC CAT F 2007
ARCTIC CAT F 2008
BMW R 1976
BMW R 1977
BMW R 1978
BMW R 1986
BMW R 1987
BMW R 1988
BMW Paris Dakar R 1989
BMW R 1990
BMW R 1991
BMW R 1992
BMW Paris Dakar R 1993
BMW Paris Dakar Classic R 1994
BMW Paris Dakar Classic R 1995
BMW Paris Dakar Classic R 1996
BMW Roadster Classic R 1994
BMW Roadster Classic R 1995
BMW Roadster Classic R 1996
BMW R 1986
BMW R 1987
BMW R 1988
BMW R 1989
BMW R 1990
BMW R 1991
BMW R 1992
BMW R 1987
BMW R 1988
BMW R 1989
BMW R 1990
BMW R 1991
BMW R 1992
BMW R 1993
BMW Classic R 1994
BMW Classic R 1995
BMW R 1978
BMW R 1979
BMW R 1980
BMW R 1981
BMW R 1982
BMW R 1983
BMW R 1984
BMW R 1985
BMW R 1978
BMW R 1979
BMW R 1980
BMW R 1981
BMW R 1982
BMW R 1983
BMW R 1984
BMW R 1985
BMW R 1978
BMW R 1979
BMW R 1980
BMW R 1981
BMW R 1982
BMW R 1983
BMW R 1984
BMW R 1985
BMW R 1986
BMW R 1987
BMW R 1988
BMW R 1989
BMW R 1990
BMW R 1991
BMW R 1992
BMW R 1993
BMW R 1987
BMW R 1988
BMW R 1989
BMW R 1990
BMW R 1991
BMW R 1992
BMW R 1981
BMW R 1982
BMW R 1983
BMW R 1984
BMW R 1985
BMW R 1986
BMW R 1987
BMW R 1988
BMW R 1969
BMW R 1970
BMW R 1971
BMW R 1972
BMW R 1973
BMW R 1974
BMW R 1975
BMW R 1976
BMW R 1977
BMW R 1978
BMW R 1979
BMW R 1980
BMW R 1984
BMW R 1985
BMW R 1986
BMW R 1987
BMW R 1988
BMW R 1989
BMW R 1990
BMW R 1991
BMW R 1992
BMW R 1993
BMW R 1977
BMW R 1978
BMW R 1979
BMW R 1980
BMW R 1977
BMW R 1978
BMW R 1979
BMW R 1980
BMW R 1980
BMW R 1981
BMW R 1982
BMW R 1983
BMW R 1984
BMW R 1985
BMW R 1986
BMW R 1987
BMW R 1988
BMW R 1989
BMW R 1991
BMW R 1992
BMW R 1993
BMW R 1994
BMW Paris Dakar R 1990
BMW Basic Last Edition R 1996
BMW R 1991
BMW R 1992
BMW R 1993
BMW R 1994
BMW R 1982
BMW R 1983
BMW R 1984
BMW R 1985
BMW R 1986
BMW R 1987
BMW R 1988
BMW R 1989
BMW R 1990
BMW R 1991
BMW R 1992
BMW R 1993
BMW R 1994
BMW R 1982
BMW R 1983
BMW R 1984
BMW R 1985
BMW R 1973
BMW R 1974
BMW R 1975
BMW R 1976
BMW R 1973
BMW R 1974
BMW R 1975
BMW R 1976
Harley Davidson Sportster 1984
KAWASAKI AE 1981
KAWASAKI AE 1982
KAWASAKI AR 1981
KAWASAKI AR 1982
KAWASAKI Twin KZ 1979
KAWASAKI LTD Twin KZ 1980
KAWASAKI LTD Twin Belt Drive KZ 1983
KAWASAKI Z 1984
KAWASAKI Z 1985
KAWASAKI Z 1986
KAWASAKI Z 1987
KAWASAKI Z 1988
KAWASAKI Z 1989
KAWASAKI LTD Twin Z 1980
KAWASAKI LTD Twin Belt Drive Z 1983
KAWASAKI LTD Twin Belt Drive Z 1984
KAWASAKI Voyager ZN 1983
KAWASAKI Voyager ZN 1984
KAWASAKI Voyager ZN 1985
KAWASAKI Voyager ZN 1986
KAWASAKI Voyager ZN 1987
KAWASAKI Voyager ZN 1988
MOTO GUZZI BREVA 2004
MOTO GUZZI BREVA 2005
MOTO GUZZI BREVA 2006
MOTO GUZZI BREVA 2007
MOTO GUZZI BREVA 2006
MOTO GUZZI BREVA 2007
MOTO GUZZI BREVA 2008
MOTO GUZZI BREVA 2009
MOTO GUZZI BREVA 2010
MOTO GUZZI BREVA 2011
MOTO GUZZI BREVA 2008
MOTO GUZZI BREVA 2009
MOTO GUZZI BREVA 2010
MOTO GUZZI BREVA 2011
MOTO GUZZI BREVA 2007
MOTO GUZZI BREVA 2008
MOTO GUZZI BREVA 2009
MOTO GUZZI BREVA 2007
MOTO GUZZI BREVA 2008
MOTO GUZZI BREVA 2009
MOTO GUZZI CALIFORNIA 1994
MOTO GUZZI CALIFORNIA 1995
MOTO GUZZI CALIFORNIA 1996
MOTO GUZZI Anniversary CALIFORNIA 2012
MOTO GUZZI CALIFORNIA 2002
MOTO GUZZI CALIFORNIA 2003
MOTO GUZZI CALIFORNIA 2004
MOTO GUZZI CALIFORNIA 2011
MOTO GUZZI CALIFORNIA 2006
MOTO GUZZI CALIFORNIA 2007
MOTO GUZZI CALIFORNIA 2008
MOTO GUZZI CALIFORNIA 2009
MOTO GUZZI CALIFORNIA 2010
MOTO GUZZI CALIFORNIA 2011
MOTO GUZZI CALIFORNIA 1998
MOTO GUZZI CALIFORNIA 1999
MOTO GUZZI CALIFORNIA 2000
MOTO GUZZI CALIFORNIA 2001
MOTO GUZZI CALIFORNIA 2002
MOTO GUZZI CALIFORNIA 2003
MOTO GUZZI CALIFORNIA 2004
MOTO GUZZI CALIFORNIA 2005
MOTO GUZZI CALIFORNIA 2002
MOTO GUZZI CALIFORNIA 2003
MOTO GUZZI CALIFORNIA 2004
MOTO GUZZI CALIFORNIA 2005
MOTO GUZZI CALIFORNIA 1994
MOTO GUZZI CALIFORNIA 1995
MOTO GUZZI CALIFORNIA 1996
MOTO GUZZI CALIFORNIA 1997
MOTO GUZZI CALIFORNIA 1998
MOTO GUZZI CALIFORNIA 1999
MOTO GUZZI CALIFORNIA 2000
MOTO GUZZI CALIFORNIA 2000
MOTO GUZZI CALIFORNIA 2001
MOTO GUZZI CALIFORNIA 1999
MOTO GUZZI CALIFORNIA 2000
MOTO GUZZI CALIFORNIA 2001
MOTO GUZZI Sport CALIFORNIA 2002
MOTO GUZZI CALIFORNIA 2003
MOTO GUZZI CALIFORNIA 2004
MOTO GUZZI CALIFORNIA 2005
MOTO GUZZI CALIFORNIA 2006
MOTO GUZZI CALIFORNIA 2007
MOTO GUZZI CALIFORNIA 2008
MOTO GUZZI CALIFORNIA 2006
MOTO GUZZI CALIFORNIA 2007
MOTO GUZZI CALIFORNIA 2008
MOTO GUZZI CALIFORNIA 2009
MOTO GUZZI CALIFORNIA 2010
MOTO GUZZI CALIFORNIA 2011
MOTO GUZZI CALIFORNIA 2012
MOTO GUZZI GRISO 2005
MOTO GUZZI GRISO 2006
MOTO GUZZI GRISO 2007
MOTO GUZZI GRISO 2008
MOTO GUZZI GRISO 2007
MOTO GUZZI GRISO 2008
MOTO GUZZI GRISO 2009
MOTO GUZZI GRISO 2010
MOTO GUZZI GRISO 2011
MOTO GUZZI SE GRISO 2012
MOTO GUZZI GRISO 2013
MOTO GUZZI SE GRISO 2014
MOTO GUZZI SE GRISO 2015
MOTO GUZZI SE GRISO 2016
MOTO GUZZI GRISO 2006
MOTO GUZZI GRISO 2007
MOTO GUZZI GRISO 2008
MOTO GUZZI 1987
MOTO GUZZI 1988
MOTO GUZZI 1989
MOTO GUZZI 1990
MOTO GUZZI 1991
MOTO GUZZI 1992
MOTO GUZZI 1993
MOTO GUZZI 1994
MOTO GUZZI NORGE 2006
MOTO GUZZI NORGE 2007
MOTO GUZZI NORGE 2008
MOTO GUZZI NORGE 2006
MOTO GUZZI NORGE 2007
MOTO GUZZI NORGE 2008
MOTO GUZZI NORGE 2007
MOTO GUZZI NORGE 2008
MOTO GUZZI NORGE 2007
MOTO GUZZI NORGE 2008
MOTO GUZZI QUOTA 1998
MOTO GUZZI QUOTA 1999
MOTO GUZZI QUOTA 2000
MOTO GUZZI QUOTA 2001
MOTO GUZZI S 1974
MOTO GUZZI SPORT 1994
MOTO GUZZI SPORT 1995
MOTO GUZZI SPORT 1999
MOTO GUZZI SPORT 2000
MOTO GUZZI SPORT 1996
MOTO GUZZI SPORT 1997
MOTO GUZZI SPORT 1998
MOTO GUZZI SPORT 1999
MOTO GUZZI SPORT 2000
MOTO GUZZI SPORT 2007
MOTO GUZZI SPORT 2008
MOTO GUZZI SPORT 2009
MOTO GUZZI SPORT 2010
MOTO GUZZI SPORT 2011
MOTO GUZZI S.E. SPORT 2012
MOTO GUZZI SPORT 2009
MOTO GUZZI SPORT 2010
MOTO GUZZI SPORT 2011
MOTO GUZZI SPORT 2012
MOTO GUZZI STONE 2002
MOTO GUZZI STONE 2003
MOTO GUZZI STONE 2004
MOTO GUZZI STONE 2005
MOTO GUZZI STONE 2002
MOTO GUZZI STONE 2003
MOTO GUZZI STONE 2003
MOTO GUZZI STONE 2004
MOTO GUZZI STONE 2005
MOTO GUZZI T3 1975
MOTO GUZZI T3 1976
MOTO GUZZI T3 1977
MOTO GUZZI T3 1978
MOTO GUZZI T3 1979
MOTO GUZZI T3 1975
MOTO GUZZI T3 1976
MOTO GUZZI T3 1977
MOTO GUZZI T3 1978
MOTO GUZZI T3 1979
MOTO GUZZI T3 1980
MOTO GUZZI T3 1981
MOTO GUZZI T4 1980
MOTO GUZZI T4 1981
MOTO GUZZI T4 1982
MOTO GUZZI T5 1983
MOTO GUZZI T5 1984
MOTO GUZZI T5 1984
MOTO GUZZI T5 1985
MOTO GUZZI T5 1986
MOTO GUZZI T5 1987
MOTO GUZZI T5 1988
MOTO GUZZI V 1978
MOTO GUZZI V 1979
MOTO GUZZI V 1980
MOTO GUZZI V 1981
MOTO GUZZI V 1982
MOTO GUZZI V 1983
MOTO GUZZI V 1984
MOTO GUZZI V 1985
MOTO GUZZI V 1975
MOTO GUZZI V 1976
MOTO GUZZI V 1977
MOTO GUZZI V 1978
MOTO GUZZI V 1979
MOTO GUZZI V 1980
MOTO GUZZI V 1981
MOTO GUZZI V 1982
MOTO GUZZI V 1983
MOTO GUZZI V 1984
MOTO GUZZI V 1978
MOTO GUZZI V 1979
MOTO GUZZI V 1980
MOTO GUZZI V 1981
MOTO GUZZI V 1982
MOTO GUZZI V 1983
MOTO GUZZI V 1984
MOTO GUZZI V 1985
MOTO GUZZI V 1986
MOTO GUZZI V 1987
MOTO GUZZI V 1988
MOTO GUZZI V 1989
MOTO GUZZI V 1990
MOTO GUZZI V 1991
MOTO GUZZI V 1992
MOTO GUZZI V 1993
MOTO GUZZI V 1994
MOTO GUZZI V 1995
MOTO GUZZI V 1996
MOTO GUZZI Centauro V10 1998
MOTO GUZZI Centauro V10 1999
MOTO GUZZI Centauro V10 2000
MOTO GUZZI Centauro V10 2001
MOTO GUZZI Centauro V10 1998
MOTO GUZZI Centauro V10 1999
MOTO GUZZI Centauro V10 2000
MOTO GUZZI Centauro V10 2001
MOTO GUZZI Centauro V10 1998
MOTO GUZZI Centauro V10 1999
MOTO GUZZI Centauro V10 2000
MOTO GUZZI Centauro V10 2001
MOTO GUZZI Coppa Italia V11 2003
MOTO GUZZI Coppa Italia V11 2004
MOTO GUZZI Coppa Italia V11 2005
MOTO GUZZI V11 2001
MOTO GUZZI V11 2002
MOTO GUZZI Catalysator V11 2003
MOTO GUZZI Rosso Corsa V11 2004
MOTO GUZZI Rosso Corsa V11 2005
MOTO GUZZI V11 2006
MOTO GUZZI V11 2002
MOTO GUZZI V11 2003
MOTO GUZZI V11 2004
MOTO GUZZI V11 2005
MOTO GUZZI V11 1998
MOTO GUZZI V11 1999
MOTO GUZZI V11 2000
MOTO GUZZI V11 2001
MOTO GUZZI V11 2002
MOTO GUZZI Cafe V11 2003
MOTO GUZZI Ballabio V11 2004
MOTO GUZZI Ballabio V11 2005
MOTO GUZZI Ballabio V11 2006
MOTO GUZZI 2016
MOTO GUZZI 2017
MOTO GUZZI 2018
MOTO GUZZI Sport 2019
MOTO GUZZI 2020
MOTO GUZZI 2016
MOTO GUZZI 2017
MOTO GUZZI 2018
MOTO GUZZI 2019
MOTO GUZZI 2020
POLARIS 2004
POLARIS 2005
POLARIS 2006
SKI-DOO (BRP) 1998
SKI-DOO (BRP) 1999
SKI-DOO (BRP) 2000
SKI-DOO (BRP) 2001
SKI-DOO (BRP) 2002
SKI-DOO (BRP) 2003
SKI-DOO (BRP) 2004
SKI-DOO (BRP) 2005
SKI-DOO (BRP) 2006
SKI-DOO (BRP) 2007
SUZUKI GT 1974
SUZUKI GT 1975
SUZUKI GT 1976
SUZUKI GT 1977
SUZUKI GT 1978
SUZUKI GT 1979
SUZUKI Solifer PV 1987
SUZUKI Epo PV 1988
SUZUKI Solifer PV 1989
SUZUKI Epo PV 1990
SUZUKI Solifer PV 1991
SUZUKI Solifer PV 1992
SUZUKI Epo PV 1993
SUZUKI Epo PV 1994
SUZUKI PV 1995
SUZUKI Epo PV 1996
SUZUKI Epo PV 1997
SUZUKI PV 1998
SUZUKI Epo PV 1999
SUZUKI Epo PV 2000
SUZUKI Epo PV 2001
SUZUKI Epo PV 2002
SUZUKI PV 2003
SUZUKI TS 1991
SUZUKI TS 1992
SUZUKI TS 1993
SUZUKI TS 1994
SUZUKI TS 1995
SUZUKI TS 1996
SUZUKI TS 1997
SUZUKI TS 1998
SUZUKI TS 1999
SUZUKI TS 2000
SUZUKI ZR 1984
SUZUKI ZR 1985
SUZUKI ZR 1986
SUZUKI ZR 1987
VESPA P 1979
VESPA P 1980
VESPA P 1981
VESPA P 1982
VESPA P 1983
VESPA P 1984
VESPA P 1981
VESPA P 1982
VESPA P 1983
VESPA P 1984
VESPA Automatic PK 1984
VESPA Automatic/ E-Start PK 1985
VESPA Automatic PK 1986
VESPA Automatic PK 1987
VESPA PX 1984
VESPA PX 1981
VESPA PX 1982
VESPA PX 1983
VESPA PX 1984
VESPA E-Start 1984
VESPA 1985
VESPA E-Start 1986
VESPA E-Start 1987
VESPA E-Start 1988
VESPA 1989
VESPA E-Start 1990
VESPA E-Start 1991
VESPA E-Start 1992
VESPA RALLY 1968
VESPA RALLY 1969
VESPA RALLY 1970
VESPA RALLY 1971
VESPA RALLY 1972
VESPA RALLY 1973
VESPA SS 1964
VESPA SS 1965
VESPA SS 1966
VESPA SS 1967
VESPA SS 1968
YAMAHA TY 1993
YAMAHA TY 1994
YAMAHA TY 1995
YAMAHA TY 1996
YAMAHA TY 1985
YAMAHA TY 1986
YAMAHA Maxim XJ 1982
YAMAHA Maxim XJ 1983
YAMAHA Maxim XJ 1984
YAMAHA XS 1978
YAMAHA XS Eleven XS 1979
YAMAHA XS 1980
YAMAHA XS 1981
YAMAHA XS 1982
YAMAHA XS 1983
YAMAHA XS Eleven Special XS 1979
YAMAHA XS Eleven Special XS 1981
YAMAHA XS Eleven Midnight Special XS 1980
YAMAHA XS Eleven Midnight Special XS 1981
YAMAHA XS Eleven Special XS 1980
YAMAHA XS 1981
YAMAHA XS 1982
YAMAHA XS 1976
YAMAHA XS 1977
YAMAHA XS 1978
YAMAHA Virago XV 1996
YAMAHA Virago XV 1997
YAMAHA Virago XV 1998
YAMAHA Virago XV 1999
YAMAHA Virago XV 2000
YAMAHA Virago XV 1998
YAMAHA Virago XV 1999
YAMAHA Virago XV 2000
YAMAHA Virago XV 2001
YAMAHA Virago XV 2002
YAMAHA Virago XV 2003
YAMAHA Virago XV 1996
YAMAHA Virago XV 1997
YAMAHA Virago XV 1998