The Freightliner Cascadia 2018 and newer outer air dam bumper carrier is a practical and reliable replacement for OEM numbers 21-28990-000 and 21-28990-001. It comes with mounting hardware included and is available in both driver side and passenger side options. Sold individually, this product offers convenience and ease of installation. Upgrade your vehicle with this high-quality air dam bumper carrier for improved functionality and durability.