Active Autowerke F3X 340i | 440i Performance Valved Rear Exhaust GEN 2 435i Made out of 6061 aluminum

Made out of 6061 aluminum

Take a look at the power created below:

And now the improved sound becomes more pronounced when the valve is opened by the ECU

and proprietary

Active Autowerke F3X 340i | 440i Performance Valved Rear Exhaust GEN 2 435i Made out of 6061 aluminumDOES NOT FIT 440 Gran Coupe. True BMW performance, durability, and attractive weight advantages with innovative features places the Active Autowerke BMW F3x 340i exhaust in a class of its own. And now Active Autowerke has developed Gen 2 of this model which has been enhanced to take advantage of the OEM valve system. This system is constructed from 100% Brushed 304 stainless steel and features adjustable brushed, black or carbon Active Autowerke