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MHD is the way to go for N54 tuning. It's so simple to use and the results are incredible. I had a JB4 ready for install but really didn't feel like messing with my wiring when MHD is a simple flash. The fact that you can easily upload different stages as you add mods is a plus too. I'm now at stage 2+ and my car is faster than I can use on the street but I love it.
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