HS 26423 PT Engine Cylinder Head Gasket Set for Ram 1500 Factory. Item model number: HS 26423 PT. COMPATIBILITY – Fits 2011-2020 Ram 1500; 2011-2018 Ram 2500; 2011-2018 Ram 3500; 2019-2020 Ram 1500 Classic; 2009-2020 Chrysler 300; 2009-2009 Chrysler Aspen; 2009-2010 Dodge Ram 1500; 2009-2010 Dodge Ram 2500; 2009-2009 Dodge Ram 3500; 2009-2020 Dodge Ch.