Thread: Is the jb4 completely safe?
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      08-02-2013, 08:19 PM   #1
lcg
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Drives: 2008 bmw 335i
Join Date: May 2013
Location: toronto

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Is the jb4 completely safe?
Looking for some advice from ppl that have done the tune...
Is it completely safe/harm free?
I want to avoid running into problems, I've heard a lot of great reviews about the tune
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