Active Autowerke E39 Performance Software - 528i m340i The factory E9X M3 muffler

The factory E9X M3 muffler features a Noise Canceling Chamber inside the muffler and Active Autowerke has retained this feature by adding two custom Active Autowerke noise canceling chambers (NCC)on each muffler to reduce/minimize the drone (the 'booming' noise some muffler emit at cruising speeds

1 year warranty on SC kit components only

year-2015-make-bmw

Recallibrated settings for a smoother and more responsive part throttle transition

Active Autowerke E39 Performance Software - 528i m340i The factory E9X M3 muffler***Before your order ships you MUST sign and return the Off Road Use Only Waiver available HERE. Please email, fax or take a photo of the completed form. You can email it to your sales rep or to info@activeautowerke. com and you can fax it to us at (305) 253 8921*** Active Autowerke offers unparalleled performance software. Through careful remapping of the factory BMW DME tables, various elements such as ignition timing, fuel delivery, and part