Arrow 71722PK Thunder Titanium Slip-On Muffler w/Carbon End Cap for Honda CB 600 F Hornet 07-13/CBR 600 F 11-13Material : Titanium End Cap : Carby Approval : Homologated E9 dB Killer : Without dB Killer Note : Homologated Exhaust for Original Collector Arrow Street Thunder More and more new bikes are designed with very small silencers. moreover, these small silencers are also fitted in strange positions: these facts made necessary to use smaller and smaller exhaust systems also in the after market production. For these reasons Arrow decided to introduce in the