Unique style, with black ceramic body and bright red logo/writing.The insulator is made of 95% pure aluminum oxide and is characterized by high resistance to thermal shock and a high degree of insulation.

For Harley-Davidson FXS Low Rider,FX Super Glide,Fat Bob FXEF,FXSB Low Rider,Low Rider FXRS,FXST Softail Standard,FXSTC Softail Custom,Road King FLHR,FLH Electra Glide,FLT Tour Glide.The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4​ the size of a conventional nickel electrode

For Harley-Davidson FLHT Electra Glide,FLTR Road Glide,FLHR Road King M8 Milwaukee-Eight.The ultimate in 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

For Harley-Davidson    Softail Street Bob FXBB,Breakout FXBR,Deluxe FLDE,Fat Bob FXFB,Fat Boy FLFB,Heritage Classic FLHC,Low Rider FXLR,Slim FLSL,Sport Glide FLSB M8 Milwaukee-Eight.The ultimate in 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...

For Harley-Davidson FXD Dyna Super Glide,FXDF Fat Bob,FXDL Low Rider,FXDB Street Bob,FXSTB Softail Night Train,FXSTS Softail Springer,FLSTN Deluxe,FXSB Breakout,FLSTSB Cross Bones,FLS Slim,Electra Glide FLHT,FLHR Road King.The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4​ the size of a conventional nickel electrode

For Harley-Davidson V-Rod VRSCAW,V-Rod VRSCA,Night Rod VRSCD,Street Rod VRSCR.The ultimate in spark plug technology and performance from the industry leaderThe iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4​ the size of a conventional nickel electrode

For Harley-Davidson XL 1200T Superlow,XL 1200C Custom,XL 1200CX Roadster,XL 1200X Forty Eight,XL 1200V Seventy-Two,XL 1200XS 48 Special,XL 883L Superlow,XL 883N Iron,XL 1200NS Iron.The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4​ the size of a conventional nickel electrode

Conventional style spark plugs, available in OEM heat ranges.Plugs have a unique look with a black ceramic body and bold red logo/script

Conventional style spark plugs, available in OEM heat ranges.Plugs have a unique look with a black ceramic body and bold red logo/script

Conventional style spark plugs, available in OEM heat ranges.Plugs have a unique look with a black ceramic body and bold red logo/script