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harmang550 harmang550 is offline
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Posts: 1
Join Date: Jul 2016
Car: 2012 BMW 550XI
Default 07-13-2016, 01:37 AM

So if I install the jb4 do I just choose the best map by trying it out and it'll have more power than stock? or do I have to play around with settings and such and thats the difference between stage 2 and jb4? sorry im new to this
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