Sounds like the Energy Polariser that Peter Brock put into his HDT Commodores that was supposed to 'align' the molecules of the car. Nobody could prove it worked, probably because it wasn't described in a text book
Cheers
Joe
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Hino Rainbow motorhome conversion towing a Daihatsu Terios
Or those little multi sided discs that "changed the hertz frequency" according to the stupid woman trying to flog them at one of the 4WD, caravan and camping shows years ago. She wasn't happy with me telling her in front of the crowd what a fraud it was.
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Yes I am an agent of Satan, but my duties are largely ceremonial.