Active Autowerke High Performance 42mm Blow Off Valve Replacement Diaphragm | BOV | E82 135 N54 1M E9X 335 MS45 Through careful remapping to the

Through careful remapping to the BMW DME

Every effort was made to ensure that the midpipe would work with the stock exhaust and enhance the sound with a deeper tone

but it is better knowing the horsepower numbers under such conditions

quality product

Active Autowerke High Performance 42mm Blow Off Valve Replacement Diaphragm | BOV | E82 135 N54 1M E9X 335 MS45 Through careful remapping to the***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*** Replacment diaphragm for your Active Autowerke 42mm Blow Off Valve!