QR Code Link to This Post Harley Davidson Sundowner Seat The Sundowner™ Seat provides the maximum in long-riding comfort, along with a healthy helping of style and quality. This seat features a deep, contoured rider bucket that provides lower back support to keep you comfortable longer.Wide passenger pillion increases passenger comfort as well Seat width 16.0" Part Number 51540-06 Fits '06-later Dyna® models. FXD, FXDB, and FXDLS models require separate purchase of Seat Bumper Kit P/N 51653-06, Passenger Footpegs, and Passenger Footpeg Mounting Kit P/N 50210-06. Seat width: 16.0"; passenger pillion width: 12.0".