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Originally Posted by nKoan
Whoever told you that is really stretching the truth.
The Cobb maps are extremely safe (and as such, are somewhat down on power), and you still have all the factory knock sensors in place which will keep your car from detonating.
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Really? As I have been lead to believe, the factory knock sensor is a weak microphone based one that doesn't work at higher RPM's (above 4K IIRC). Knock is common on 04's stock as I mentioned before. The ECU will pull timing at specific RPM's and this could manifest itself as a flat spot in the powerband. It's really a bandaid to the problem and not a solution though.