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Interesting stuff here. I have a JB4 and have considered a flash but don't want to do the taking out ECU thing. Am wondering what would be the TOTAL gain with JB4 and say AA tune. Also wondering if it might be too much power in putting the power down---with e85 it's almost that way right now.
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 2013 335i Msport Black sapphire/Coral red. MHD. stage 2--e30 VRSF DP, ER CP, Dinan Shockware. VRSF 12mm/15mm spacers. Cobra dashcam. Various codings.
Last car: 2011 335i Msport. JB4. Vrsf CP |