Active Autowerke E39 Performance Software - 535i x1 the real meat and potatoes

the real meat and potatoes will always be the horsepower numbers

With stock downpipes

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Made from 304 stainless steel the handmade construction process ensures a robust and durable exhaust that will provide trouble free performance with the longevity to match

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Active Autowerke E39 Performance Software - 535i x1 the real meat and potatoes***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