September 26, 2013 01:21 PM
2005-2010 Mustang GT Underdrive Pulley Kits - New Options SFI Approved
We have updated the site with GMS 2005-2010 Mustang GT Underdrive pulleys. We have re worked this page to only include SFI S197 underdrive pulley kits from BBK, Steeda and GMS.
How to underdrive pulleys work?
2005 to 2010 Mustang GT underdrive pulleys get your Pony extra power and torque by slowing down the rotational speeds of your belt-driven accessories. Underdrive pulley's have slightly different diameters than your factory accessory pulleys which slows down their rotational speeds and reduces parasitic loss. Less parasitic loss means that your engine puts more power through your Pony's crankshaft and into its drivetrain.