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Veloist: I don't think his argument is "needs more power". It is more about "if more power ruins the balance of the car".
And I would be more careful about statements of high standard of quality that both brands are known for meeting. Cough cough. I ordered some factory exhaust parts lately and I wouldn't really say that the quality was high enough. They even accepted to replace the part with a new one, but even after searching their warehouse in Japan for a better quality product they didn't really met the expectation of high quality! I don't really want to start posting pictures of what I received and what they proposed to me as an alternative, but it is really a shame of where both companies are heading lately and in fact consumers have no idea about it. A customer will never take apart a new car's exhaust to check what is inside and especially on material before the catalyst that could cause loss of power or even significant damage.