Quote:
Originally Posted by 1911A145
When we change out the turbo(s) on these cars, isnt it required that a custom tune be done to make this mod work safely?
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i was under that impression as well. I thought RB turbos came with a modified JB4? but wasnt sure how that could work for a 1M.
On a side note, I love your screenname. Mine should be HKUSP45