Beck 18mm Air-Cooled Spark Plugs w/ Knurled Nuts Harley Knucklehead UL WLA WLC

  • Product Code: 292109769609
  • Availability: Out Of Stock
  • $54.95


You are buying one pair of air-cooled Beck 18mm spark plugs, heat range #3.  These come with both knurled thumbscrews for use with hooked spark plug cables as well as the later style cap tops to be used with hooded cables.  This is a Cimarron Cycle Works exclusive.  These are new production plugs designed to replace OEM Harley and Champion air-cooled spark plugs.  Please study the photos and feel free to ask questions.  These come with the brass top nuts which can be used with the earlier style open hook terminals or the hooded style.

We also sell these with the thumbscrews with black umbrella covers and brass or aluminum cooling fins on other listings as well as just with the standard cap terminal tops for later style spark plug terminals.

These are not a conversion kit like the Champion ones I sell, these are a fully unitized spark plug.  Set your gap at .025 for optimum performance.

These are fully-functional and perfect for your daily or weekend rider.  They look just like original Harley and Champion air-cooled 18mm plugs.  Unless you are going for a concours restoration, why pay $350 for an NOS set or take a risk on some 70 year old spark plugs which might not work?  These are perfect for the antique motorcycle enthusiast who likes to enjoy riding their motorcycle.

Used from 1909 to 1947 on Single, Twin, Sport Twin, J, JD, F, FD, Pea-Shooter, JDH, VL, VLH, VLD, Knucklehead: E, EL, F, FL, ELC, ELA, Big Twin Flathead U, UL, UH, ULH, UA, 45 Solo: RL, DL, W, WL, WLD, WLDR, WR, WLA, WLC; Servicar G and GE.

They probably would also fit Henderson, Ace, or Indian Chief and Scout models as well as automotive applications.  Please do your research to make sure you can use 18mm plugs if you are buying for a non-Harley application or a 1948 and later Harley as they generally use 14mm plugs.

Here’s what customers have to say about this part:

Nice looking and running plugs, fast delivery"

A note on shipping:

This item ships only via postal priority so we can assure their safe arrival at their destination.

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