swetrid Posted November 11, 2012 Report Share Posted November 11, 2012 I was wondering the stock boost on a Flex was. Also how much can the boost be raised in a tune and what is safe? Link to comment Share on other sites More sharing options...
Crash712us Posted November 11, 2012 Report Share Posted November 11, 2012 Stock boost 9-12psi and with tuning we are seeing up to 18psi safely so far. Link to comment Share on other sites More sharing options...
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