The Peterbilt 379, 386, and 389 12 Inch Seat Base Adapter is a practical solution for Seats Inc. Legacy Lo Seats. Available in chrome or billet aluminum, this adapter is designed to fit most Peterbilt 379, 386, and 389 seats Inc Legacy Lo Seats built after July 1st, 2018. With its easy installation and durable construction, this adapter provides a secure and comfortable seating experience. Upgrade your Peterbilt truck with the Red Baron Seat Base Adapter for enhanced convenience and support.