BMW M Performance valve exhaust silencer system for the BMW X4 - BMWBLOG (blog)

Superior power, impressive handling characteristics and a distinctively sporty design are the prominent features of the BMW X4. To enhance the character of this Sports Activity Coupe even more, BMW offers the M Performance valve exhaust silencer... This exclusive system with Bluetooth 4. 0 remote control provides two operating modes to impressively intensify the sound of the six-cylinder power unit. In Sport mode, the BMW X4 sounds significantly more emotional than with the series trim, but without foregoing everyday suitability. The entire system is made from high-grade steel, is double-sided and boasts the trapeze-shaped tailpipe finishers we are familiar with from the BMW models featuring an eight-cylinder power unit. In Sport mode, the M Performance valve exhaust silencer system is approved for operation on public roads. Source: www.bmwblog.com