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      11-23-2012, 08:30 PM   #2
denaliman
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Drives: 2021 BMW X6M Competition
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I think to get the sound and "roar" you are looking for you need the catless downpipes. Most of the "roar" is tamed by the cats up front. Different beast with the downpipes. The Akra is a better sound (subjective), but it will never be as aggressive as what you are looking for without the additional mod.
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