Free up horsepower with this underdrive pulley set. A simple way to improve performance - easy installation!
Pulleys reduce parasitic drag by slightly reducing the speed at which accessories turn, freeing up more horsepower. Includes water pump pulley and high-quality harmonic-damper with built-in crank pulley.
Fits: 2005, 2006, 2007, 2008, 2009, 2010 Mustang GT