Active Valve Control (AVC) is available to support both vehicles equipped with factory valves on the exhaust as well as a growing range of upgrades Milltek Sport offers to have performance exhaust systems with Valve Control. Also with optional App control on selected models, via iPhone or Android smartphone appâ€™s, AVC brings total control of the exhaust to the drivers finger tips, via full CAN BUS integration with built in safety controls, Milltekâ€™s AVC enables the driver to choose when the valves open and close to tune the sound and volume of the exhaust. All our performance exhaust systems are designed with you in mind, and we cater to an ever-expanding range of vehicles. We believe in continuous evolution, and our research & development team work throughout the year to deliver the most in demand solutions to all your performance exhaust requirements. All of our products are made in the UK and distributed to more than 90 countries worldwide, making Milltek Sport one of the most accessible performance aftermarket brands on the market.