Champion Power Sport Spark Plugs Fits Harley-Davidson 6R12

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Champion Power Sport Spark Plugs x 1 Pair the equivilant of Harley-Davidson 6R12


  • These high performance plugs provide more power for quicker acceleration and faster throttle response
  • Increased bore volume between the shell and the core nose to promote more stable combustion, better scavenging of deposits that cause fouling and a reduction in misfires
  • Exclusive copper core ground electode runs over 200° cooler than standard electrodes to reduce erosion

Please note we use the Harley part number 6R12 for referrence and this part number is not on the plugs. 

These plugs fit XL Sportster models 1986 & later and Twin Cam engines 1999 & Later. 

Part Number MU18057 Replace Harley-Davidson 6R12 fitted to XL Sportsters and all Twin Cam engines.


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