OEM VICTORY OCTANE PASSENGER BACKREST 2880227-658. OEM VICTORY OCTANE PASSENGER BACKREST (2880227-658) Install this Victory Passenger Backrest and a Victory Octane passenger will ride with enhanced comfort, confidence, and back support. This backrest bolts securely in place behind the Victory Passenger Seat (2880151, sold separately) and provides back support and the comfort of the backrest pad.