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Autolite Iridium Xtreme Sport Spark Plug Each

(2 reviews)

Item: 398917

Fits: 1975 Honda CB550K 550 Four

$15.43

In Stock - Ships Next Business Day!

Autolite Iridium Xtreme Sport Spark Plug Each


The Xtreme Sport Iridium Spark Plug features an iridium-enhanced finewire tip that helps with easy starting, reduces fouling of the spark plug, and ensures longer performance.

When you take your powersports to the extreme, it's time for Autolite Xtreme Sport iridium spark plugs.

  • 0.6mm finewire design for improved ignitability, faster fuel combustion and a more focused ignition versus standard plugs
  • 26% quicker starts compared standard plugs
  • As much as 21% less hydrocarbon emissions than standard plug
  • Better fuel efficiency and engine power
  • Sold individually
Specification Details
Quantity Varies (make selection above)
Spark Plug Model Varies (make selection above)

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Arctic Cat
  • 250 2x4 2002-2006
  • 250 4x4 2002-2005
  • 300 2x4 2002-2003
  • 300 4x4 2002-2005
  • DVX 250 2007-2008
  • DVX 300 2009-2010, 2012
BMW
  • K 100 1985-1986
  • K 100 LT 1987-1991
  • K 100 RS 1984-1992
  • K 100 RT 1984-1988
  • K 1200 GT 2003-2004, 2006-2008
  • K 1200 LT 1999-2009
  • K 1200 RS 1997-2004
  • K 75 1987-1995
  • K 75 C 1986-1988
  • K 75 RTA 1992-1995
  • K 75 S 1987-1995
  • K 75 SA 1991-1995
  • K 75 T 1986
  • R 1150 R 2004-2005
  • R 1150 R Rockster 2005
Buell
  • Blast 2001-2010
  • RR1000 Battletwin 1987-1988
  • RR1200 1988-1990
  • RS1200 1989-1990
  • RSS1200 1991
  • S2 Thunderbolt 1995-1996
Harley Davidson
  • FLD Dyna Switchback 2012-2016
  • FLHR Road King 1999-2016
  • FLHRC Road King Classic 2007-2013
  • FLHRS Road King Custom 2004-2007
  • FLHTC Electra Glide Classic 1999-2005, 2007-2013
  • FLHTCU Ultra Classic Electra Glide 1999-2016
  • FLHTCUL Electra Glide Ultra Classic Low 2015-2016
  • FLHTCUTG Tri Glide Ultra Classic 2009-2016
  • FLHTK Electra Glide Ultra Limited 2010-2016
  • FLHTKL Electra Glide Ultra Limited Low 2015-2016
  • FLHX Street Glide 2006-2016
  • FLHXS Street Glide Special 2014-2016
  • FLHXXX Street Glide Trike 2010-2011
  • FLRT Freewheeler 2015-2016
  • FLS Softail Slim 2012-2017
  • FLSS Softail Slim S 2016-2017
  • FLST Heritage Softail 2006
  • FLSTC Heritage Softail Classic 1999-2017
  • FLSTF Softail Fat Boy 1999-2017
  • FLSTFB Softail Fat Boy Lo 2010-2016
  • FLSTFBS Softail Fat Boy S 2016-2017
  • FLSTN Softail Deluxe 2005-2017
  • FLSTS Heritage Springer Softail 1999-2003
  • FLSTSB Softail Cross Bones 2008-2011
  • FLSTSC Softail Springer Classic 2005-2007
  • FLTR Road Glide 1999-2004, 2007-2009
  • FLTRU Road Glide Ultra 2011-2013, 2016
  • FLTRX Road Glide 2015-2016
  • FLTRX Road Glide Custom 2010-2013
  • FLTRXS Road Glide Special 2015-2016
  • FXCW Softail Rocker 2008-2009
  • FXCWC Softail Rocker C 2008-2011
  • FXD Dyna Super Glide 1999-2005, 2007-2010
  • FXDB Dyna Street Bob 2007-2017
  • FXDC Dyna Super Glide Custom 2005, 2007-2014
  • FXDF Dyna Fat Bob 2008-2017
  • FXDL Dyna Low Rider 1999-2005, 2007-2009, 2014-2017
  • FXDLS Dyna Low Rider S 2016-2017
  • FXDS-CONV Dyna Convertible 1999-2000
  • FXDWG Dyna Wide Glide 1999-2005, 2007-2008, 2010-2017
  • FXDX Dyna Super Glide Sport 1999-2005
  • FXDXT Dyna Super Glide T-Sport 2001-2003
  • FXS Softail Blackline 2011-2013
  • FXSB Softail Breakout 2013-2017
  • FXST Softail Standard 1999-2007
  • FXSTB Softail Night Train 1999-2009
  • FXSTC Softail Custom 1999, 2007-2010
  • FXSTD Softail Deuce 2000-2007
  • FXSTS Springer Softail 1999-2006
  • XL1200C Sportster 1200 Custom 1996-2019
  • XL1200CX Sportster Roadster 2017-2020
  • XL1200L Sportster 1200 Low 2006-2011
  • XL1200N Sportster 1200 Nightster 2007-2012
  • XL1200R Sportster 1200 Roadster 2004-2008
  • XL1200S Sportster 1200 Sport 1996-2003
  • XL1200T Sportster SuperLow 2014-2018
  • XL1200V Sportster Seventy-Two 2012-2016
  • XL1200X Sportster Forty-Eight 2010-2022
  • XL883 Sportster 883 2004-2008
  • XL883C Sportster 883 Custom 1999-2009
  • XL883L Sportster SuperLow 2011-2019
  • XL883N Sportster Iron 883 2009-2022
  • XL883R Sportster 883R 2002-2003, 2005-2007
  • XLH1100 Sportster 1100 1986-1987
  • XLH1200 Sportster 1200 1988-2003
  • XLH883 Sportster 883 1986-2003
  • XLH883DLX Sportster 883 Deluxe 1986-1995
  • XLH883HUG Sportster 883 Hugger 1987-2003
  • XR1200 2009-2010
  • XR1200X 2011-2012
Honda
  • ATC125M 1984-1987
  • ATC185 1980
  • ATC185S 1981-1983
  • ATC200ES Big Red 1984
  • ATC250ES Big Red 1985-1987
  • ATC250SX 1985-1987
  • ATC350X 1986
  • CB125S 1973-1985
  • CB350F 350 Four 1972-1974
  • CB400A Hawk Hondamatic 1978
  • CB400F Super Sport 400 Four 1975-1977
  • CB400T Hawk 1980-1981
  • CB400TI Hawk I 1979
  • CB400TII Hawk II 1978-1979
  • CB500K Four 1971-1973
  • CB550F Super Sport 550 Four 1975-1977
  • CB550K 550 Four 1975-1978
  • CB550SC Nighthawk 550 1983
  • CB650 1979-1982
  • CB650SC Nighthawk 650 1982-1985
  • CB700SC Nighthawk 700 S 1984-1986
  • CB750SC Nighthawk 750 1982-1983
  • CB900C 900 Custom 1980-1982
  • CB900F 900 Super Sport 1981-1982
  • CBX Super Sport 1979-1982
  • CH125 Elite 125 1984
  • CH150 Elite 150 1987
  • CH150D Elite 150 Deluxe 1985-1986
  • CM400A Hondamatic 1979-1981
  • CM400C Custom 1981
  • CM400E Economy 1980-1981
  • CM400T Twin 1979-1981
  • CM450A Hondamatic 1982-1983
  • CM450E Economy 1982-1983
  • CR500R 1984-2001
  • CRF150F 2003-2005
  • CRF230F 2003-2009, 2012-2016
  • CRF230L 2008-2009
  • CT110 Trail 110 1980-1981
  • CT125 Trail 125 1977
  • CX500 1978-1979
  • CX500C Custom 1979-1982
  • CX500D Deluxe 1979-1981
  • GL1000 Gold Wing 1975-1979
  • GL1100 Gold Wing 1980-1983
  • GL1100A Gold Wing Aspencade 1982-1983
  • GL1100I Gold Wing Interstate 1980-1983
  • GL1200 Gold Wing 1984-1987
  • GL1200A Gold Wing Aspencade 1984-1987
  • GL1200I Gold Wing Interstate 1984-1987
  • GL1200L Gold Wing Limited Edition 1985
  • GL1200SE-I Gold Wing Aspencade 1986
  • GL1500 Gold Wing 1988-1993
  • GL1500A Gold Wing Aspencade 1991-2000
  • GL1500C Valkyrie 1997-2003
  • GL1500CD Valkyrie Deluxe 2001-2003
  • GL1500CF Valkyrie Interstate 1999-2001
  • GL1500CT Valkyrie Tourer 1997-2000
  • GL1500I Gold Wing Interstate 1991-1996
  • GL1500SE Gold Wing SE 1990-2000
  • GL500 Silver Wing 1981-1982
  • GL500I Silver Wing Interstate 1981-1982
  • PC800 Pacific Coast 1989-1990, 1994-1998
  • SL125K Motosport 125 1971-1973
  • TL250K Trials 1975-1976
  • TRX250TM FourTrax Recon 2x4 2011-2012
  • TRX350FE FourTrax Rancher ES 4x4 2001-2006
  • TRX350FM FourTrax Rancher 4x4 2001-2006
  • TRX350TE FourTrax Rancher ES 2x4 2000-2006
  • TRX350TM FourTrax Rancher 2x4 2000-2006
  • TRX500FA FourTrax Foreman Rubicon 4x4 2001-2009
  • TRX500FGA FourTrax Foreman Rubicon GPScape 2004-2008
  • VF1100C V65 Magna 1983-1986
  • VF1100S V65 Sabre 1984-1985
  • VF500C V30 Magna 1984-1985
  • VF700C V40 Magna 1984-1987
  • VF700F Interceptor 1984-1985
  • VF700S V40 Sabre 1984-1985
  • VFR700F Interceptor 1986
  • VT1100C Shadow 1100 1985-1990, 1992-1996
  • VT1100C Shadow 1100 Spirit 1997-2007
  • VT1100C2 Shadow 1100 A.C.E. 1995-1999
  • VT1100C2 Shadow 1100 Sabre 2000-2007
  • VT1100C3 Shadow 1100 Aero 1998-2002
  • VT1100T Shadow 1100 A.C.E. Tourer 1998-2001
  • VT1300CR Stateline 2010-2013
  • VT1300CRA Stateline ABS 2010-2013
  • VT1300CS Sabre 2010-2013
  • VT1300CT Interstate 2010-2013
  • VT1300CTA Interstate ABS 2013
  • VT1300CX Fury 2010-2013
  • VT1300CXA Fury ABS 2010-2013
  • VT500C Shadow 500 1983-1986
  • VT500FT Ascot Twin 1983-1984
  • VT600C Shadow 600 VLX 1988-1989, 1991-2007
  • VT800C Shadow 800 1988
  • XL100 1974-1978
  • XL250 1976
  • XL250 Motosport 1972-1975
  • XL500S 1979-1981
  • XL600R 1983-1987
  • XR185 1979
  • XR200R 1981-2002
  • XR500 1979-1980
  • XR500R 1981-1984
  • XR600R 1985-1998
Kawasaki
  • 454 LTD 1985-1990
  • Eliminator 1000 1987
  • GPz 550 1981-1984
  • GPz 750 1985
  • KLR600 1984-1986
  • KLT110 1984-1985
  • KLT160 1985
  • KZ550A Standard 1980-1983
  • KZ550C LTD 1980-1983
  • KZ550F LTD Shaft 1984
  • KZ550F Spectre 1983
  • KZ550M LTD Shaft 1983
  • Ninja 1000 1986-1987
  • Ninja GPz 900R 1984-1986
  • Vulcan 1500 1996-1999
  • Vulcan 1500 Classic 1996-2004, 2006
  • Vulcan 1500 Classic Fi 2000-2002
  • Vulcan 1500 Drifter 2002-2005
  • Vulcan 1500 L 1996-1997
  • Vulcan 1500 Mean Streak 2002-2003
  • Vulcan 1500 Nomad 1999-2001
  • Vulcan 1500 Nomad Fi 2000-2004
  • Vulcan 1600 Classic 2003-2008
  • Vulcan 1600 Mean Streak 2004-2008
  • Vulcan 1600 Nomad 2006-2008
  • Vulcan 500 1990-1996
  • Vulcan 500 LTD 1996-2008
  • Vulcan 700 1985
  • Vulcan 750 1986-2006
  • Vulcan 88 1987-1995
Suzuki
  • ALT125 1983-1986
  • ALT185 1985
  • Boulevard C50 2005-2009, 2011
  • Boulevard C50C 2006-2008
  • Boulevard C50T 2005-2009, 2011-2012
  • Boulevard C90 2005-2009
  • Boulevard C90T 2005-2009
  • Boulevard M95 2005
  • DR125 1983-1984, 1986-1988
  • DR250 1983, 1985
  • DR370 1978-1979
  • DR500 1981-1983
  • GN250 1983, 1988
  • GN400T 1980, 1982
  • GN400TX 1980
  • GN400X 1980
  • GN400XT 1980
  • GN400XX 1980
  • GR650 Tempter 1983
  • GS1150E 1984-1986
  • GS650E 1981-1982
  • GS650G 1981-1983
  • GS650GL 1981-1983
  • GS650M Katana 1983
  • GS700E 1985
  • GS700ES 1985
  • GSX-R750 1986-1989
  • GSX1100F Katana 1100 1988-1993
  • GV1200GL Madura 1200 1985-1986
  • GV1400GC Cavalcade LXE 1986-1988
  • GV1400GD Cavalcade LX 1986-1988
  • GV1400GT Cavalcade 1986-1988
  • GV700GL Madura 700 1985
  • Intruder 1500 1998-2004
  • Intruder 700 1986-1987
  • Intruder 800 1992-2004
  • LT-F160 QuadRunner 160 1991-2001
  • LT-F230 QuadRunner 230 1986-1987
  • LT-F250 QuadRunner 250 2x4 1988-2001
  • LT125 QuadRunner 125 1983-1987
  • LT160 QuadRunner 160 2003-2004
  • LT160E QuadRunner 160 1989-1992
  • LT185 QuadRunner 185 1984-1987
  • LT230E QuadRunner 230 1987-1993
  • LT230S QuadSport 230 1985-1988
  • Marauder 1600 2004
  • SP370 1978-1979
  • SP500 1981-1983
  • VX800 1990-1993
Triumph
  • Rocket III 2004-2010
  • Rocket III Classic 2005-2009
  • Rocket III Classic Tourer 2006-2007
  • Rocket III Roadster 2006-2011, 2013
  • Rocket III Touring 2006-2011, 2013
  • Thunderbird 2010-2013
Victory
  • Boardwalk 2013
  • Cross Country 2010-2013
  • Cross Country Tour 2013
  • Cross Roads 2010-2013
  • Cross Roads Hard-Ball 2013
  • Hammer 2009-2011
  • Hammer 8-Ball 2011-2013
  • Hammer S 2009-2012
  • High-Ball 2012-2013
  • Judge 2013
  • Kingpin 2011-2012
  • Kingpin 8-Ball 2011
  • V92C Standard Cruiser 1999-2001
  • V92SC Sport Cruiser 2000-2001
  • Vegas 2008-2012
  • Vegas 8-Ball 2011-2013
  • Vegas Jackpot 2008-2013
  • Vision 8-Ball 2010-2011
  • Vision Street 2009
  • Vision Tour 2009-2010, 2012-2013
Yamaha
  • Bear Tracker 2x4 1999-2004
  • Big Bear 350 2x4 1996-1999
  • Big Bear 350 4x4 1987-1999
  • Big Bear 400 2x4 2000-2004
  • Big Bear 400 4x4 2000-2006
  • Big Bear 400 4x4 IRS 2007-2011
  • FJ1200 1986-1987, 1989-1992
  • FZR1000 1987-1995
  • Kodiak 400 4x4 1993-1995
  • Rhino 450 4x4 2006-2009
  • Road Star 1600 1999-2003
  • Road Star 1600 Silverado 1999-2003
  • Road Star 1700 2004-2009
  • Road Star 1700 S 2008-2013
  • Road Star 1700 Silverado 2004-2010
  • Road Star 1700 Silverado S 2008-2011, 2013
  • Road Star Warrior 2002-2009
  • Royal Star 1996-2001
  • Royal Star Tour Classic 1996-2000
  • Royal Star Tour Deluxe 1997-2000, 2005-2009
  • Royal Star Venture 1999-2009
  • Royal Star Venture S 2008-2013
  • SR185 Exciter 1981-1982
  • TT600 1983-1984
  • V-Star 650 Classic 1998-2010
  • V-Star 650 Custom 1998-2011, 2013
  • V-Star 650 Silverado 2003-2010
  • VMX1200 VMAX 1985-1986, 1988-2007
  • Wolverine 450 4x4 2006-2010
  • XC200 Riva 200 1987-1991
  • XJ550 Maxim 1981-1983
  • XJ550R Seca 1981-1983
  • XS500 1975-1978
  • XT250 1984
  • XT350 1985-2000
  • XT550 1982-1983
  • XVZ1200 Venture 1983-1984
  • XVZ1200 Venture Royale 1983-1985
  • YFB250 Timberwolf 2x4 1992-1996
  • YFB250FW Timberwolf 4x4 1994-1995, 1997-2000
  • YFB250U Timberwolf 2x4 1996-1998
  • YFM200 Moto-4 1985
  • YFM225 Moto-4 1986-1988
  • YFM250 Moto-4 1989-1991
  • YFM350X Warrior 1987-1999
  • YFP350U Terra Pro 1988
  • YFU1 Pro-4 Pro Hauler 1989
  • YTM200 Tri-Moto 1983-1985
  • YTM225DR Tri-Moto 1985-1986
  • YTM225DX Tri-Moto 1983-1985

Customer Reviews

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Extreme Sport Spark Plug

By   on  Verified Purchaser

Nice.


Iridium Plug

By   on  Verified Purchaser

Works great.


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