These are aluminum CNC cut 2+2 Side Splitters and aresold as a set (driver & passenger). Mounting hardware is included.
Available in the Subtle profile in either raw aluminum or black powder coat.
Holes will need to be drilled into the car matching the corresponding holes in the splitters to complete the installation. See the video below for installation of Subtle profile side splitters (video is of S30 2-seater chassis installation, but it will be almost the same on the 2+2).