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18 On the ground, the 3-inch true dual exhaust from Kooks looked great but the real magic was in the sound. Gone was the factory rasp, replaced with a deep, thundering tone that sounded more like a traditional big-block than a stock LS1. Under acceleration, the X-pipe and 3-inch exhaust sounded like no other F-body we’ve heard in a long time and we experienced no rasp under deceleration or mid-range driving. View Related Article
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