{"product_id":"18mm-doering-spark-plug-set","title":"18mm Doering Spark Plug Set","description":"\u003cp\u003eLarge hex original design for air cooled engines  #3 heat range terminal nuts and seal washers included.\u003c\/p\u003e\n\u003cp\u003eIncludes top ventilated brass collars for cooling  as original  Doering design! Terminal nut is not removable. Plug set has a round feeler gauge. Spark plugs have a 18mm thread and the large hex measures 1-3\/8 inch  which is perfect for early restoration and riding. Set is for use with 1924 Harley models that require 7\/8 inch thread spark plug. *NOTE: Sold as a pair.  *NOTE: Fits early Knuckleheads  that can accept the 1-3\/8 inch large hex. *NOTE: Air cooled spark plug set features a nickel plated full size hex. Full size hex is for single and twin flat heads  For IOE types  with space for the large hex. Doering Spark Plug Company was founded in Brooklyn  NY in 1918  making plugs for tractors. In the later years  they made plugs for automotive applications  for motors that burned an excessive amount of oil. They are manufactured to the original standards of that era  but not in Brooklyn any longer.\u003c\/p\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e V-Twin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eV-Twin Part Number:\u003c\/strong\u003e 49-0878\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 77376\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Side Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Group:\u003c\/strong\u003e Electrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e TAIWAN\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1930-1936 VL\u003c\/li\u003e\n\u003cli\u003e1930-1936 RL\u003c\/li\u003e\n\u003cli\u003e1926-1929 J\u003c\/li\u003e\n\u003cli\u003e1937-1947 W\u003c\/li\u003e\n\u003cli\u003e1937-1948 U\u003c\/li\u003e\n\u003cli\u003e1936-1947 G\u003c\/li\u003e\n\u003cli\u003e1924-1930 JD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlease verify fitment before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"V-Twin","offers":[{"title":"Default Title","offer_id":47498082025556,"sku":"49-0878","price":68.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0700\/0122\/9908\/files\/49-0878.jpg?v=1786567428","url":"https:\/\/skywaycyclesupply.com\/products\/18mm-doering-spark-plug-set","provider":"Skyway Cycle Supply","version":"1.0","type":"link"}