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How are you finding the difference in power/torque?
In sport mode, is the car noticeably quicker?
I had a chance to drive a 540i with a Racechip today and in midrange, it pulls much harder. I switched the RC on and off a few times to test and was impressed. Top end seemed no quicker but that is not where we need the power, and if it was quicker it would be hard to tell at those sorts of speeds.
I want to go OEM but I am doing it for the power, so I am wondering if (after trying a 540i with Racechip) I will think the MPPSK is not enough.
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