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Yeh mine only makes the sound during cold starts as well. Even at the dealership I noticed that sound on many of their cars on a cold start. But hey when I rev up my engine or gas it hard, it sounds freaking sweet. I don't think I would go for a quieter exhaust. mine sounds wicked as is.
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G37s 6MT, Platinum Graphite. FI HFC, Custom X-Pipe.
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