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  1. HP Tuner vs Diablo Predator

    Performance Discussion/Modifications
    Tried searching for HP tuner and it would only let me search Tuner since HP is too short. What are the pros and cons of these 2 tuners? If I plan on making bigger changes, like heads/cam, can Diablo make custom tunes? How much do those cost, or are they free to upload? Thanks
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