Part Number : 157IB78. Application : Peterbilt 378 Accessory Drive Belt Tensioner Pulley. 2001-2007 Peterbilt 378 10.8L DIESEL. Part Type : Accessory Drive Belt Tensioner Pulley. DriveAlign Idler Pulleys provide OE-quality fit to passenger cars and light trucks, performing as a locked center tensioning pulley, an automatic belt tensioner pulley or an idler pulley.
