Timing Belt Tensioner Pulley compatible with Mack MP8 Diesel engines.Fits GU Series models from 2009 to 2015, including CHU and CXU Series from 2008 to 2015, MRU Series from 2012 to 2015.Also fits D13 Diesel engines for VHD models from 2007 to 2013 and VN Series from 2007 to 2015. This component is not from the brand.References to models are used only to indicate fitment.