Home/Shop by Part/Engine & Engine Management/Belts and Engine Timing/Idler & Tensioner Pulleys Narrow The Number Of Models Shown By Telling Us The Year Filter Models by Year Year 2018 2017 2016 2015 2014 2013 2012 2011 Choose your Western Star Model # 4900EX Idler & Tensioner Pulleys 4900FA Idler & Tensioner Pulleys 4900SA Idler & Tensioner Pulleys 5700XE Idler & Tensioner Pulleys