Active Autowerke E39 Performance Software - 540i 335 GESi proprietary precious metal loading

GESi proprietary precious metal loading technology ensures greatly reduced emissions

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This filter is available for both US Spec and Euro Spec M3's from 2008-2012

This muffler spawns a sound that is much more assertive than the stock exhaust system

Active Autowerke E39 Performance Software - 540i 335 GESi proprietary precious metal loading***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