I’ve done everything from the typical: CAI, Bilstein 5100s, leveling kit, wheels and tires to the unique which includes sound deadening the entire cab, behind the grill lights with a factory switch, 12” video rear view mirror that films front/back whenever the truck is running, carbon fiber steering wheel, factory footwell lighting, etc. The items that people comment the most on are the Denali cluster, rear view camera system, and the cover king ballistic seat covers. The majority of upgrades were for certain reasons like Z36 brake upgrade for towing and the dual battery for beach days.