It's a Chrysler fan, not sure what it came out of, phil gave it to me. It's one speed. It's mounted as close as I could to the radiator, I'd say about 1.25" maybe. When it kicks on the fan moves forward from it's shroud a bit so I couldn't put it right up on it without it hitting once it kicked on. It pulls SO much air I could have mounted it 6" away if I had room. Right now I just have it wired to a 30amp relay and 20amp toggle mounted in the dash. I am going to buy the kit from O'Reilly so it doesnt run all the time, just couldn't bring myself to spend $35 for it over the weekend... So I'll be going back for it. I'll find out what chrysler vehicle that's out of... I'm curious now.