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Yes, let's put this into perspective, there are literally tens of thousands of JB4 installs on N54 and N55 engines that have never experienced a problem. It is a robust product - well proven and tons of fun. My 09 N54 335i was a blast on JB4.
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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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