Active Autowerke Maad Maxx 3 Can Valve Exhaust for BMW F80 M3 F82 M4 ECSTuning
Details on pricing and fitment here! Active Autowerke Maad Maxx 3 Can Valve Exhaust for BMW F8X M3/M4 The Active Autowerke F8X rear exhaust was carefully engineered to eliminate the unflattering sound of the factory M3 and M4 exhaust, while also allowing for optimum flow and resonance. Every effort was made in addressing the not so appeasing sound of the stock OEM exhaust, but in designing an exhaust worthy for an “M” car. We believe our rear exhaust combined with our mid-pipe offers the deepest sound and best performance of any other system on the market today. See more from ECSTuning below!
