BCS Powervalve Exhaust Review

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Zonda_
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Re: BCS Powervalve Exhaust Review

Post by Zonda_ » Thu Aug 03, 2017 3:52 pm

I'm just about to order one of these, how easy is it to do the valve mod you talk about?
M135i 2013 - Estoril Blue, auto, 3 door, misery spec.

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