Hartge is too expensive for what you are getting IMO.
I am planning to install the BMS Stage 1 after break in. I confirmed that the BMS solution addresses throttle response.
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Past: E36 325i, E39 540i, F46 323i (AA tuned), E82 3.0NA, E84/F30 N20 BMS Stage 1, E70 X5 N55, F06 N55
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