the flap will open above 2k rpms and during cold start. you should hear the flap close like a minute or two after the cold start. I too have had the same issue with ice build up on the left tip and thats because i was in comfort and not over 2k to open the valve.
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2018 PB/Black G01 X3M40i | 699M | ZDA | ZPP | ZPX | Maxton front lip | X3M vents | 15mm Spacers | Diamond G20 style grills
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