These are an option but only are two pounds lighter than the aluminum (magnesium?) stock wheels. Still pretty cool looking and note these aren't painted like the GT350R wheels.
http://www.autoblog.com/2016/05/17/ford-gt-optional-carbon-fiber-wheels-news/
http://www.autoblog.com/2016/05/17/ford-gt-optional-carbon-fiber-wheels-news/
