Graves Motorsports Kawasaki Ninja 400 + Ninja 500 +Z400 + Z500  Carbon Cat-Back Slip-On exhaust. Our exhausts are hand-made in the USA for direct fitment. This slip-on exhaust is new from the ground up with record breaking race developed features. Graves' precise engineering develops precision products that are designed to outlook, outperform and outlast the competition. Graves Exhaust systems are designed for the elite rider seeking top of the line performance, fit, finish and value. This exhaust system was developed using the same technology that has powered the Graves Racing Team to 23 Professional AMA National Championships including 8 Superbike Championship titles and 3 Side x Side Pro Titles (Pro Stock and Pro Mod UTV). This product retains the OEM catalytic converter system.