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Unfortunately, there is no JB4 for the N55 in an X5 because of a different DME. The Stg 1 BMS has some pretty decent gains though (30whp and ~50 torques) and for the cost and ease of install and removal, is probably the route I would go if I had the 3.0
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2006 E90 330i (retired)
2009 E90 335i (retired)
2012 E70 X5 50i M Sport (retired)
2016 F10 535i M Sport
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