I think P.T. Barnum might have had a sales franchise on those things. I've seen them used on round track race engines on occasion- - - -mostly by guys at the back of the pack who were desperate to do anything they could to stay on the lead lap. Compared to a Predator, a Rochester B looks like a good choice.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!