2005-2010 Mustang GT Metco Motorsports 4-piece Billet idler pulley kit. Part number MIP-2005. New in box, we are a Metco dealer but this is inventory we are discounting as it has been on display in our showroom and we are changing up our display inventory. So this is the ONLY 1 available at this price.
 
4-Piece Billet Idler Kit
2005 - 2010 Mustang GT
Six-Rib Accessory Drive
An Original Metco Motorsports Design!
The billet idler pulleys included in this kit can be installed as direct replacements for the original idler pulleys on the Ford 4.6L 3V engine.  These pulleys are precision-machined from billet aluminum and are built to exactly match the dimensions of the OEM pulleys. 
Like all Metco Motorsports pulleys, these heavy-duty pulleys are hard-coat anodized in black on the back side and belt surface to resist wear from the belt and surface corrosion.  The front of the each pulley is machined to match the popular design of the pulleys we manufacture for the Cobra, Lightning, and GT500 applications.  Like our other pulleys, each pulley in this kit (except the tensioner pulley) includes a billet bearing cover and a stainless steel retaining bolt.
The kit includes (2) 90mm smooth idlers, (1) 87mm grooved idler pulley, and (1) 76mm smooth idler pulley.  No modifications to the vehicle are necessary and no special tools are required for installation.  The belt length is unchanged with the installation of this pulley set.   
 
   
Installation Notes:  One of the included 90mm smooth idler pulleys installs in place of the original pulley on the driver's side of the engine, and the grooved idler pulley replaces the original idler directly beneath it.  The second 90mm idler pulley replaces the original on the passenger side of the engine above the tensioner, and the included 76mm pulley replaces the pulley on the tensioner arm.  On the tensioner arm, an application-specific hex bolt is provided to mount the pulley in the same fashion as the original pulley.