This is the same system that took Ryan Dungey to a AMA 450 Supercross class championship aboard a bike we won't talk about. In a nutshell, it's a full race system with every detail taken into consideration resulting in a system that's light years ahead of you stock OEM smoke blower. There's options depending on how deep your pockets go but the end result is a exhaust system that was engineered from the ground up to be the best of the best. It features the latest generation Polyresonant Duplex Chamber technology with a two-staged stepped baffle which reduces the db's to reasonable level all the while giving your bike unrestricted breathing ability. This all adds up to a system that can't be denied when you're on the hunt for a new set of lungs for your KTM 450 SX-F.