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Going FBO without a tune is leaving the car stock lol. There is absolutly no point running FBO without a tune. FBO are support mods so you can go ahead and push the car more by tuning it, other than that they are useless.
JB4 or MHD would be your way to go. I have run MHD for a while now and it does have small hiccups but nothing big enough that would push me to stay stock.
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TOTALED  | 2011 E90 335i xDrive - BMS Cold Air Intake - ETS Charge Pipe - ETS 7" FMIC - MHD Stage 2+ - GFB DV+ - PE Mod - VRSF Catless Downpipe - xDelete - xHP Stage 3
2015 E84 X1 35i M-Sport
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