M140i / M240i F2x and 340i / 440i F3x Forge Motorsport Carbon Fiber Air Duct

Made from carbon fiber for aesthetic appeal and thermal regulation, this Forge Motorsport air duct is designed to fit without modification behind the grille of the BMW M140i / M240i / 340i and 440i F series models, directing airflow from the front of the vehicle to the B58 engine's airbox. By delivering a greater volume of fresh air compared to stock, this accessory helps to optimize the performance of a sports air filter or a complete air intake system.