Underdrive Pulley Set

By replacing the factory alternator, crank, and water pump pulleys with these underdrive units, you can unleash additional horsepower from your 4.6L V8 engine. Their brilliant polished finish adds a touch of style to your engine bay, providing added flash and visual appeal. The kit can typically be installed in under 2 hours, making it an accessible upgrade for many enthusiasts. The pulleys are designed for late 2001 to 2004 Mustang GT models equipped with the short water pump pulley featuring a bowed-in face, and they reuse the factory serpentine belt. A technical note indicates that Ford changed the water pump design midway through the 2001 model year, introducing a shorter shaft.