Porsche 911 GT3 pictures, images, photos and wallpaper. The Porsche 911 GT3 was introduced in 1999 as a high performance version of Porsche's first version of the 911, the 996, to continue the quarter-century tradition of low-weight RS models that ended with the 993 RS. The GT3, named after the FIA GT class it was intended for, did not use the rather simple engine of the regular production