Akrapovič sound control kit, manufacturer part number P-HF1321, for ALFA ROMEO Stelvio Quadrifoglio 2017-2020.

TThe optional Akrapovič Sound Kit enables owners of selected Akrapovič car exhausts to control the sound of the system from the cockpit of their machine. Using Akrapovič technology, drivers can easily switch between the quiet mode and a sportier sound. With the use of a receiver (already included in evolution system) to drive the actuators that open or close the valves at the end of the exhaust system, drivers can use the Sound Remote Controller or the new smartphone app (for iOS and Android) to regulate the valves. Akrapovič Sound Kit is also compatible with cars equipped with Alfa Romeo first fit or accessory Akrapovič exhaust. With the use of the optional Akrapovič Sound Kit, the ECE type approval is no longer valid. Pictures are symbolic. USER MANUAL INSTALLATION INSTRUCTIONS