Active Valve Control (AVC) is available for vehicles equipped with factory exhaust valves, as well as a growing range of Milltek Sport performance exhaust systems with Valve Control. Optional app control is available on selected models via iPhone or Android smartphones, providing total control of the exhaust through full CAN BUS integration with built-in safety controls. Milltek's AVC allows the driver to choose when the valves open and close, tuning the sound and volume of the exhaust. All performance exhaust systems are designed for a wide range of vehicles, with continuous research and development to deliver in-demand solutions. All products are made in the UK and distributed to more than 90 countries worldwide. - Supports factory and Milltek Sport valve-equipped exhaust systems - Optional app control for selected models via smartphone - Full CAN BUS integration with safety controls - Allows driver to tune exhaust sound and volume Specifications: - Pipe Diameter: 0.00 - Race Product: No - EMarked: No Kit comes with: - Active Valve Controller - MSVS023 Vehicle Compatibility: - 2017 and later Alfa Romeo Giulia Quadrifoglio 2.9 V6 Bi-Turbo (Non OPF/GPF Models) - 2018 and later Alfa Romeo Stelvio Quadrifoglio 2.9 V6 Bi-Turbo