If your car is tuned you need them to raise the limiter! When I have my m6 I always hung out 3rd till the end. If your shifting 4 your loosing speed, have them raise it to 7k. I use to cross the traps around 6800 if I remember right. This is your only option, and your motor will be fine.
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10.91 at 122 H/C stock block N/A
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