Active Autowerke F3X 340i | 440i Performance Valved Rear Exhaust GEN 2 435i and proprietary

and proprietary

deep idle rumble

year-2014-make-bmw-model-228i

1) Locate an Active Autowerke approved N55 Software Dealer and have it installed there

Active Autowerke F3X 340i | 440i Performance Valved Rear Exhaust GEN 2 435i and proprietaryDOES 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