Arrow 71863PK Thunder Titanium Slip-On Muffler w/Carbon End Cap for Yamaha YZF R6 17-21Product Descriptions Arrow's 71863PK Thunder Exhaust, Titanium with Carbon Cap is made specifically for Yamaha YZF R6 (2017 current) Homologated Titanium Thunder Silencer With Carbon End Cap for Original And Arrow Collectors Last generation of street bikes are made following a precise design and style idea, giving a fundamental importance in using the smaller exhaust systems possible, placed in some "non conventional" position. These styling and