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Do not rev it that high. There is know need to. If you have don interal motor work then yes. I set mine to 6,500, only because of the s/c I would bang off the rev limiter in first all the time I spun the tires. My motor will sping the tires at 6,300 and then drop to 6,000 and I shift. If I open her up I shift at 6,000. I hope that helps