Akrapovič uses performance-oriented catalytic converters that give you all the sound and performance upgrades you’re used to with Akrapovič exhaust systems. The catalytic converter is a honeycomb metal structure that incorporates precious metals (palladium, rhodium, and platinum) into its surface. These metals convert the poisonous carbon monoxide and unburned hydrocarbons found in exhaust gases into non-toxic carbon dioxide and water vapor.Click here to see more info about the product (https://www.akrapovic.com/en/moto/product/20289/Honda/CB-650-F/2018/Catalytic-converter?brandId=30&modelId=735&yearId=4861/)