Harley Knucklehead UL WL WLA Globe 18mm Air-Cooled Spark Plugs 1909-48 Champion
- Product Code: 353331291915
- Availability: Out Of Stock
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$59.95
You are buying one pair of air-cooled Globe 18mm spark plugs, heat range #3. 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.
If you notice, these bear a close resemblance to the Champion style metal bases which appear to have been used primarily for Harley-Davidsons as other spark plugs from that era did not have air-cooled bases or rarely did. The story goes that Harley dumped Champion for 1937 due to some sort of contract dispute. H-D, to their horror, discovered they no longer had a partner to make spark plugs- a pretty important commodity to make your new motorcycle run and drive so they made a deal with Globe whilst patching up their relationship with Champion. By 1938, Champion plugs were being delivered in Harley twins again and well into the future. Okay, I might have taken some liberties with the story but it was along those lines. Basically, these are "restoration-correct" for 1937 but these are the least-expensive replica air-cooled base 18mm spark plugs you will find anywhere.
These are not a conversion kit like the Champion ones we sell, these are a fully unitized spark plug. Set your gap at .025 for optimum performance.
A note on shipping:
These are fully-functional and perfect for your daily or weekend rider. They look pretty much 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"
Will ship first class or priority, your choice
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