It come sin the Z/28 Aero Kit
23222454 Gurney Lip Extension Kit
EXTENSION PKG - GM (23222454)
Thinking might be the tire deflectors if they are different from the ZL1 tire wind deflectors
No site has a pic to know.. need tire wind deflectors for my camaro
Guess2 lil things on the side..
My tires stick out.. trying to help aerodynamics a lil