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That should have been my first step since i got the DP from them.
However, based on a post from their N63 downpipe thread, they offer a flash tune which deletes the O2 sensor. I dont think any flash tune from any of the US-based tuners is an option for me cuz i dont live there.
I will contact them and see if they have any other option.
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F10 550i M-sport: Space Grey/Oyster Black
E39 M5 : Carbon Black/Caramel
E39 520i : Titanium Silver/Beige (Sold)
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