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marc silva · 02-20-2014, 01:13 AM

I have a set of Champion 4 spark plugs. They are close in appearance to a 3x but the threads are shorter and they don't have the short un-threaded part on the end below the threads. Will they work in a model A? Does anyone know what they are supposed to be in?

02-20-2014, 01:13 AM	#1
marc silva Senior Member Join Date: Apr 2013 Location: santa rosa ca Posts: 260	champion 4 spark plug I have a set of Champion 4 spark plugs. They are close in appearance to a 3x but the threads are shorter and they don't have the short un-threaded part on the end below the threads. Will they work in a model A? Does anyone know what they are supposed to be in?