The shop that I was referring too that is a well known one is Z1 and they said that I didn't need the GTM VBU upgrade as they could do the same with a tune, so my main questioning was what would the "real" benefits of getting the VBU done by itself get me? So hope that perks everyone's curiosity of which shop I was referring too and the reason I'm asking, don't have 2k to go throwing around just to "find out" the hard way.
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