Milltek Active Valve Control System - BMW F80/G80 M3 Saloon, G82 M4Active 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. Features: Uses remote controls to open and close the valves What's Included: Milltek Active Valve Control System Fitment Details: F80 M3 Saloon F82 F83 M4 Coupe Convertible Competition Coupe (Non OPF Models) F87 M2 Competition