This exhaust manifold hardware kit matches the original hardware required to secure the exhaust manifold to the engine on specified vehicles, and is made from quality materials for reliable performance. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Chevrolet C4500 Kodiak: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [Chevrolet C5500 Kodiak: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [Chevrolet Express 2500: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [Chevrolet Express 3500: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [Chevrolet Express 4500: 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [Chevrolet Silverado 2500 HD Classic: 2007] - [Chevrolet Silverado 2500 HD: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [Chevrolet Silverado 3500 Classic: 2007] - [Chevrolet Silverado 3500 HD: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [Chevrolet Silverado 3500: 2001, 2002, 2003, 2004, 2005, 2006] - [GMC C4500 Topkick: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [GMC C5500 Topkick: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [GMC Savana 2500: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Savana 3500: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Savana 4500: 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Sierra 2500 HD Classic: 2007] - [GMC Sierra 2500 HD: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Sierra 3500 Classic: 2007] - [GMC Sierra 3500 HD: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016] - [GMC Sierra 3500: 2001, 2002, 2003, 2004, 2005, 2006] - [Hummer H1: 2006] - [Workhorse Custom Chassis P42: 2005] - [Workhorse Custom Chassis W72: 2007] - [Workhorse LF72: 2005, 2006, 2007, 2008, 2009, 2010, 2011] - [Workhorse R26: 2009]