[b454rat]

When I was stationed in Canada, my father had one installed in my car. Was a heavy duty unit, not sure what it was, but it went into the soft plug and IIRC a heater hose. I found out the hard way just how hot it was, I grabbed the heater hose when I first used it, an left a red mark on my hand lol. But the car would start without touching the gas. I would start the car, unplug the cord, and by time get back in the car, it was warm inside. It was awesome lol. Always wanted one ever since, never had one. But, IMO it doesn't get the cold to really need one. Diesels maybe, but never had a vehicle that didn't start cause it was cold.