FS - Front Spoiler. Attaches below the front bumper or on the bumper without removing the OEM bumper or bumper cover. FV - Fender Vents. Attaches on the front fenders behind the front wheels. GR - Grille.
Replacement grills that some come with and some without head or fog lights.
HS - Hood Scoop. Bolt on or mold on scoops that attach to the hood. HW - Hood Wing. Wing that attaches to the front of the hood. LTS - Lights.