How much horsepower does a 5.3 liter have?

The horsepower of a 5.3L engine varies significantly depending on the year, make, model, and specific engine configuration. There's no single answer. A 5.3L engine from a Chevrolet truck in one year might have 300 horsepower, while the same displacement in a different vehicle or year could produce anywhere from 280 to over 350 horsepower. You need to specify the *make and model of the vehicle* to get an accurate horsepower rating.