Thread: BMS Stage 1 > JB4 Upgrade
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      08-24-2015, 09:33 AM   #5
13M5F10
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Drives: 2013 BMW M5 | MSR Stage 3
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Quote:
Originally Posted by lfelunden View Post
Nice write-up!!
I just ordered the JB4 upgrade for my stage 1

So, the maps only work correctly if you got the BCM?
It's my understanding that it doesn't produce much more power than Stage 1 at the moment until BCM is out. The maps work but don't hit the target boost.
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