Guest canucktruck Posted April 21, 2012 Share Posted April 21, 2012 Found a box of Wizard plugs, most of them are "Thermodisk"Some are numbered #21 and L1300. Other numbers are #74, and 15-L1315, and others are 18mm. Are these bike plugs or car? Link to comment Share on other sites More sharing options...
Guest Commodore Posted April 23, 2012 Share Posted April 23, 2012 Wizard was a brand of the old "Western Auto" company and as such your spark plugs could be for anything from car to a tractor. Link to comment Share on other sites More sharing options...
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