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  1. Gen2 MS3 - Louder engine braking growl at 2600-3000 RPM + shutdown noise

    Hey everyone, Looking for some opinions before I start throwing parts at the car. Car: 2013 Mazdaspeed3 ~155,000 km Cobb SF intake No CEL or stored codes Issue #1 During engine braking, above about 3000 RPM, the car sounds normal at first, but as the revs pass through roughly 3000-2600...
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