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Nice! That defenetly sounded like misfiring, now at least you know what it sounds like. Only thing missing is for you to feel a misfire while doing a pull but trust me you will probably infer what is it lol.
It's a good thing to have upgraded plus but really not necessary for stage 2+. Really becomes mendatory when you are upgrading turbos andnwill havd more agressive tuning and generating more boost.
So if ever you are having misfiring issue with those and need to order some, you can just swap in the stock Bosch meanwhile.
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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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