Questions for Truck Hardware Gatorback Black Wrap High Country Mud Flaps - Set of 4 - Fits 2020-2026 Chevy Silverado 2500/3500HD

Good day, I was wondering why I need the FC002 Caps when my truck already had them? I am looking at 2020-2023 Silverado 2500/3500 HD Gatorback Offset Nylon High Country w/Black Wrap No-Drill Mud Flaps Set - Requires FC002K Caps. Thank you

- Jeffery Tschacher on 10/11/2022