Graves Motorsports Carbon Cat-Black Slip-On Exhaust '19+ Kawasaki ZX-6RGraves Motorsports Kawasaki ZX6-R Carbon Slip-On (Cat Back). Graves Motorsports hand-made in the USA Carbon slip-on Silencer for the 2019 ZX6-R. 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. This product is intended for closed course competition use only. New Silencer Design Featuring: Carbon Fiber Sleeve with Titanium End Cap and stainless steel exhaust tubing. Strapless can design mounts without the use of strap bands around the silencer by using a bracket that's structurally integrated. This design not only streamlines looks of your bike and saves weight.