Seller notes

You are buying one pair of Champion D-16 spark plugs with the air-cooled adapter kit I've been selling on eBay for some time plus reproductions of the aluminum cooling fin "umbrellas". They will arrive completely assembled just as they are shown in the first photo. These are genuine D-16 18 mm plugs which works out to a #3 heat range for Harley-Davidson motorcycles. This kit is pretty neat, it utilizes newly-machined air cooled hex with original styled threaded retainer rings which the original ...

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