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So still nobody has explained HOW these are better than stock. Would need to see dyno for power gains but even if it gained predicted power, I am curious how that gain is achieved. Is the header tube diameter different? More smooth bends or completely different bends to modify exhaust pulses? Just wondering as visually there is nothing really different and for most cars headers usually replace a simple exhaust manifold or a catted header so the power gain is obvious but with this OEM awesome sed of catless headers I am curious where this power is being freed up from?
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