There was a recent thread here that someone posted a picture of some old spark plugs. Reminded me of these little buggers that a neighbour gave me for doing him a favour. Maybe some of the older members can shed a little light on these?
Those are interesting. Also interesting, is the fact that "they will outlast your car" yet I didn't see a guarantee mentioned. They were trying to re-invent the wheel even back then I see.
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Member of Brantford Piston Pushers and a Disciple of Speed of the E.L.T.A.