How much horsepower does a 5.7 L 350 engine have?

The horsepower of a 5.7L 350 engine varies significantly depending on the year, make, model, and specific modifications. There's no single answer. A naturally aspirated (non-turbocharged/supercharged) 5.7L small-block Chevy engine might produce anywhere from 250 hp to over 400 hp depending on the factors mentioned above. Modern versions with performance tuning could even exceed 400 hp.