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i just purchased a f10 535 m sport, i see you guys installed jb3, is jb4 compatible? would it give more gains?
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2011 535 M-sport l xdrive l adaptive drive l BSM l Dakota
2011 335 is l DCT l BSM l saddle brown l Everything else l Sold
2011 x5 35 l AW l red interior l everything else l
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