How much horsepower in a 2006 Saleen mustang?

The horsepower of a 2006 Saleen Mustang varied significantly depending on the specific model. Saleen offered several different packages and trims that year, each with different engine modifications and resulting horsepower outputs. You'll need to specify the *exact* Saleen model (e.g., Saleen S281, Saleen Extreme, etc.) to get an accurate horsepower figure. They ranged from roughly 350 hp to well over 500 hp for the highest-performance versions.