Thread: RG Sport - Introducing RaceChip for 2020-up BMW M550iX
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      10-29-2020, 07:21 PM   #5
Texox
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Drives: 2021 M550i
Join Date: Jun 2010
Location: Dallas, Texas

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What is the optional XLR? What does that do? Sorry if it's a basic question. I am new to the G30 and tuning.
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