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  • Ngk Racing series plugs are engineered to withstand the harshest engine conditions
  • Special insulator nose configurations improve throttle responce
  • Corrugated ribs prevent flashover
  • Pure alumina silicate ceramic insulator provides superior strength and better heat transfer
  • Copper core aids in heat removal
  • Triple seals prevent leakage

 
This item fits the following models:
 
Harley Davidson FLH Duo Glide 1958 - 1964