This exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the original manifold on specified vehicles. It includes all necessary gaskets and downpipe hardware for a complete repair. Vehicle model years this part fits: Chevrolet Express 1500: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Chevrolet Express 2500: 2003, 2004, 2005 Chevrolet Express Cargo: 2009, 2010, 2011, 2012, 2013, 2014 Chevrolet Silverado 1500 Classic: 2007 Chevrolet Silverado 1500: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 GMC Savana 1500: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 GMC Savana 2500: 2003, 2004, 2005 GMC Sierra 1500 Classic: 2007 GMC Sierra 1500: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Workhorse FasTrack FT931: 2003