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The exhaust pipe bellow provides a flex point in the exhaust system between the engine and after-treatment emissions equipment. Our direct replacement exhaust pipe bellows are quality-engineered to absorb displacements, vibrations and thermal expansion from extreme exhaust temperatures. All Dorman Exhaust Pipe Bellows are direct fit replacements and includes all required components for a complete repair, where applicable. Vehicle model years this part fits: Kenworth T2000: 2008, 2009, 2010, 2011 Kenworth T300: 2008, 2009, 2010, 2011, 2012, 2016, 2017, 2018 Kenworth T370: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Kenworth T400: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Kenworth T440: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Kenworth T660: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Kenworth T800: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Kenworth W900: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Peterbilt 330: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Peterbilt 335: 2008, 2009, 2010 Peterbilt 386: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Peterbilt 387: 2008, 2009, 2010, 2011 Peterbilt 388: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Peterbilt 389: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019