Quote:
Originally Posted by chas3wba0
Question: if I already have the flexfuel kit (custom tuned for turbo) installed and then I decide to upgrade headers, does that require a re-tune at both 91 and e85? Or will simply updating the tune at e85 suffice?
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If header was already catless then it's likely ok it may make turbo spool a little different and possibly hit boost limiter but unlikely just log data and check but should be fine