If You Want Sound With Your Performance (Or Performance With Your Sound!), GFB’s T9488 VTA Delivers! By combining atmosphere venting with the proven performance benefits of our ground-breaking DV+, the VTA delivers an aggressive blow-off sound, improved throttle response, as well as superior boost holding and reliability. With its low-profile integrated solenoid and compact design, installing the T9488 is a breeze. Just swap out your factory diverter valve with the VTA, and you’re good to go! Key features and benefits: Blow off sound AND better performance Reliable boost holding Sharper throttle response, faster boost recovery Low-profile integrated solenoid for seamless installation Australian-made, backed by a lifetime warranty T9488 is a direct bolt-on for most Mercedes turbo petrol vehicles. Twin-turbo engines typically require two valves.Kit includes:1 x T9488