The 2021 Kia K5 carbon fiber side skirts are compatible with all Kia K5 trim levels: LX, LXS, GT-Line, EX, and GT Trim. ADRO parts are designed and manufactured in South Korea. Free shipping within the lower 48 states.
There are other companies that make the side skirts, and also front and rear splitters as well.
As far as the OEM spoiler, you may want to look into 3rd party spoilers. The factory OEM spoilers for the GT-Line and GT trims have bolts to help keep them in place, holes that the LX, LXS, and EX trims do not have on the trunk. But it's up to you if you still want to go that route.