I've done alot of reasearch into this and the only downsides i have found is that your gonnna be without a car for a week and you need to use super gas. the only "dangerous" thing about it is that it raises your rev limit to almost 8k... although even with the A3 that should be safe. Im in the middle of making the decision of going with the reflash or KPro. i know im gonna turbo eventually so I'll probably go KPRO from the start just so i dont have to send my ECU to california twice.
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