Factory replacement idler pulley for use with a 6 rib serpentine belt. Offered in Black, Silver, Red, Purple or Blue Front Spacer. The external portion of the pulley that contacts the belt is only offered in black.  The color choice below is for the front spacer that covers the bearings.   Most 6.2L vehicles have 2 of these pulleys one as an idler and one as a tensioner.   Installation torque spec:  Idler Pulley Bolts: 29Nm or 21Ftlbs