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You'll have to get a custom tune via OFT or a third party person (I.E. Steve, Wayno, etc). If you buy the OFT FF kit from OFT, it should come with a tune. It's all personal preference IMO. The specific features (like AN fittings or specific fuel lines) and the possible coding maybe different, but at the end, all the kits are just designed to read the hz signal coming from the flex fuel sensor and converting it to a 0.5-4.5v or a 0-5v signal for the ecu/tune to read.
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