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I don't know if this helps anyone, but I've found that different gas affects the amount of chirping I get. Shell 93 Octane, Valero 93 Octane, and Exxon 93 Octane make my car sound like a symphony at a stop light. However, when I use Texaco/ Chevron 93 Octane my car almost never chirps unless it's 95+ degrees out and even then it's pretty faint. Could just be my BRZ, though...
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