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some questions...
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01-27-2015, 09:08 PM
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hawkm3
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Drives: 2009 135i
Join Date: Jun 2014
Location: Central Cali
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Iso is the firmware jb4 runs Now, if you buy a jb4 pretty sure it already comes with iso 5 like mine did. And no you don't need a flex fuel wire, you can run up to 40% e85 just monitor how the car does
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