Arrow 71856AK Race-Tech Aluminium Slip-On Muffler w/Carbon End Cap for Kawasaki Z 900 17-19/Z 900 E 17-18/Z 900 A2 19-24Product Descriptions Arrow's 71856AK Race Tech Slip on Exhaust, Aluminum with Carbon End Cap is made specifically for Kawasaki Z900 (2017 current). 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