Arrow 71734PKK Race-Tech Titanium Slip-On Muffler w/Carbon End Cap for Kawasaki ZX-6R 09-16/ZX-6R 636 13-16Product Descriptions Arrow's 71734PKK Race Tech Exhaust, Titanium with Carbon Cap is made specifically for ZX 6R (2009 2016) ZX 6R 636 (2013 2016). Race Tech exhaust range was the first series of silencers designed with the new diamond shaped section. This design replaced (quite completely, but not at all) in the past years the older silencers sections, oval and cylindrical. The advanced profile (looks like a diamond, with smooth corners) makes it