Big things come in small packages, and these little engines pump out a great deal of power for being so small.

While they won’t do much in your car, they’d turn a small RC car into a muscled monster that could go so fast you’d miss it if you blink. Special nod goes to the wild airplane engine that had to be bolted to the table for worry it would take off!

Read More: These Five Engines Prove There Is a Replacement for Displacement

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