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Dinan Sport Tuner is a best bang for your buck Solution. Not only easy installation but also comes with Bluetooth to adjust the modes. Look the previous threads to discuss about the performance difference, they're almost same but you have to spend over 1K USD vs. 249USD? I used to run Sport Tuner over 2 years and was so happy the result, then I'm running the BM3 tune for the stage 2 now.
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