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How did your old spark plugs look? Could you post a picture of them? A lot of what you described can also be found after changing your spark plugs. I doubt that the majority of the kit being cooling has that much effect on the throttle and such. That screams spark plugs. MAYBE the reflash. But then they should have been fixing lag a long time ago.
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2015 435i Gran Coupe - Current
2008 AW 135i - Sold |