Went to spoiler king and had them measure up the k5 for a rear window spoiler great product highly recommend they have 2 versions.
spoilerking.com
spoilerking.com

Kia K5 (DL3) 2021-present Rear Window Roof Spoiler (284R)
This curved roof spoiler design measures at 2 5/8" wide & 1 1/4" high. Spoiler is made from high quality polyurethane material and will sit flush against the edge of the windshield of the vehicle. It includes self adhesive tape for easy installation. Spoiler is UNPAINTED with a flat black...


Kia K5 (DL3) 2021-present Rear Window Roof Spoiler w/ Center Cut (284R
This curved roof spoiler design measures at 2 5/8" wide & 1 1/4" high with a center cut out. Spoiler is made from high quality polyurethane material and will sit flush against the edge of the windshield of the vehicle. It includes self adhesive tape for easy installation. Spoiler is UNPAINTED...
