Genuine Triumph set of 3 chrome header casting covers, part number T2209130.  This part fits the following Triumph motorcycles.

Triumph Rocket III CLASSIC & ROADSTER 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018

Triumph Rocket III Touring 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018