Agency Power Exhaust for BMW F80 M3 F82 M4 ECSTuning
Pricing and fitment details here! Agency Power Exhaust for BMW F8X M3/M4. Agency Power has tested several different exhaust designs and has finally come up with the best system available for the M3 M4. This new stainless steel exhaust features dual 63.5mm diameter piping that incorporates an X design right after the downpipes. Removing the restrictions that are found on the stock exhaust to release more power as you go through the revs. With the factory valves functioning like stock, you can cruise mildly in ECO mode and get a louder more aggressive sound in sport mode to get the best of both worlds. See more from ECSTuning below!
