CS Racing vs Stock Exhaust Dyno Results. Kawasaki 636 2019-on CS Racing Exhaust Dyno Sound.Kawasaki 636 2019-on CS Racing Exhaust Dyno Results. Kawasaki 636 2019-on Original Exhaust Dyno Results. The item "2019-21 Kawasaki ZX-6R Ninja 636 CS Racing Slip-on Exhaust + dB Killer (+3.7hp)" is in sale since Tuesday, August 13, 2019. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Exhausts & Exhaust Systems\Silencers, Mufflers & Baffles". The seller is "cs_racing_usa" and is located in Tarpon Springs, Florida. This item can be shipped worldwide.