I am now new here too, and soon taking delivery of a slightly used 2020 230i base, and I would like to do the same conversion! I saw the same kit from Kies, and I think the rear bumper will be purchased from a salvaged car (salvage network or ebay, etc.) and refinished.
Were you able to find any other options? Converting to dual exhaust is the other part of the plan. Thanks.
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