Ducati 996 Dual Slip-On Exhaust Systems: Let your Ducati 996 roar with a Two Brothers Racing exhaust system. This slip-on exhaust system is designed to fit both the monoposto (single seater) and the biposto (two seater) versions of the 996 and does not require adjusting the FI. Canisters for the 996 use our straight tipped, CNC?ed aluminum end cap.