Euro 1-2 homologated. This is a Cobra USA manufactured exhaust that is modified by Thorcat to EC regulations with an EC / ABE approved cartridge baffle. This makes the Thorcat-Cobra a 100% legal exhaust system. The EC / ABE certification is valid for unmodified stock bikes, for the specific models and model years as mentioned in the product description. Designed to be aggressive and radical in looks, with a nice sound. The styling is a sure match to any custom and even stock bikes. It will absolutely smash the dull looks of the stock exhaust system. The Short Swept is the ticket to the next customizing level! Note: Comes with 18mm O2 threads, includes 12mm conversion inserts and sensor-hole plug set so exhaust will fit all model years. Note: Euro 1-2 certified exhausts comes with an EC / ABE approved non-removable baffle. Note: Every Thorcat exhaust, and the individual components used for approval, come with a unique serial number. You must provide the bike's VIN number (frame number) to register your exhaust system in the Thorcat register; a document on how to do this is included. Once registered, you will receive a Thorcat ID card that can be used to prove the legality of your exhaust system.