The Razor Tip Full Exhaust for the Ninja z650 is one of the best ways to open up peak power that's hindered by the factory exhaust and make some more noise at the same time.. The engine + Razor combination sounds "meaty" and offers a "throaty" punch. These Razor Canisters also have optional DB Killers available for them so you don't always have to brap around town if you don't want to!