Agreed, which is why it sucks to sell it. I could dumb it down to work with the BMS FSB and it'll work with the JB4, but then I'm using a meth system that's twice as good but only using half it's potential. S63TU tuning is beyond the needs for JB4 anymore, unlike my S63, so this would benefit an S63TU far better than my S63.
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