Engine swaps make the world a better place -- there’s no question about that. Have an old Mazda Miata and want to go fast? Easy! Slap a V8 under the hood and you’ve solved your performance problem.

Harbor Freight sells two versions of its Predator 212 engine with differing horsepower outputs. Both are four-stroke designs featuring horizontal crankshafts, recoil pull-start, and 212cc ...