QD EXHAUST MV Agusta Brutale 800 / Dragster / F3 X-DB the Sound Controller (E2/E3 homologated)X DB sound controller by QD Exhaust for MV Agusta Brutale 800 Dragster F3. The X DB sound controller by QD Exhaust is a revolutionary modulation kit designed specifically for MV Agusta Brutale 800, Dragster 800, and F3 800 bikes. As a flagship QD Exhaust product, the X DB sound controller seamlessly integrates with the bike's exhaust valve system, utilizing all OEM components such as the valve, servomotor, and cables. This innovative system offers