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MHD and JB4 are recommended for a reason. There is no point in spending over $1,000 on a tune for minimal gains.
You have an 11' so your best option would be a MHD flash. Take the money you are saving and put it towards a downpipe or intercooler, or both.
That is my opinion. There is support both on the flash only side of MHD, and BMS has a website dedicated to JB4 support. If you would like the benefits of both you could also do a BEF, but I wouldn't bother unless you are FBO.
Bottom line, flash tune it with MHD and be happy.
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2011 BMW 335i E90 - FBO w/ Pure Stage 2 Turbo on JB4 BEF
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