OEM Harley Fatboy Seat 2018^ M8 FLFB FLSTF Sundowner New T/o Solo Passenger pad  harley part #'s  52400160 52000333    believe its a sundowner. customer took off bike when new.

info from harley below.

Ride sun-up to sun-down in comfort and style. The Sundowner™ Solo Seat’s shape and foam density were developed and refined during hundreds of hours of test rides and ergonomic evaluations. The unique seat features a deep bucket design that cradles the tailbone and provides back support for the rider. The narrow nose of the seat was sculpted to bring the legs closer together, and to look great where it meets the tail of the fuel tank.

• Black

• Constructed with premium vinyl surfaces for comfort and durability

• Smooth vinyl and double row stitched side panels

• Complements the Original Equipment passenger pillion

• For additional passenger comfort, add the matching Sundowner Pillion P/N 52400170 (sold seprately)