Underdrive crank pulley for all 2005-2009 4.0L V6 Mustangs.
Looking to improve the performance of your V6 Mustang while improving gas mileage as well? You have found what you need!
This underdrive crank pulley/harmonic damper assembly directly replaces the factory unit and provides an 8 to 10 rear wheel horsepower increase by reducing parasitic accessory drag. This reduction in drag also provides an increase in gas mileage as well!
Just installed this underdrive crank pully onto my 2005 Mustang convertible, and it feels great! My engine gained a bit more power and works much smoother. Nice feeling overall!