* Manufacturer: Different manufacturers (e.g., GM, Chrysler, Toyota) tune their 5.7L engines differently, resulting in varying horsepower and torque figures.
* Year of manufacture: Even within the same manufacturer, horsepower can change from year to year due to design improvements or emissions regulations.
* Engine modifications: Aftermarket modifications (e.g., performance parts, tuning) can significantly increase horsepower.
You need to specify the *make, model, and year* of the vehicle to get an accurate horsepower rating for its 5.7L engine.