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I have the OEM mod that replaces the perforated pipes with solid pipes. I believe that the ACM mod is more of a straight pipe method, so the sound is a bit mellower with the method that I went with.
I had my mod completed locally and presume that the shop could either method.
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2022 M4 Competition ConvertibleDravit / Tartufo Full / Carbon Fiber Exterior...loaded
2020 X5:MW/Coffee Extended Merino, M Sport, B&W....loaded
2007 X3: Sapphire Black / Black loaded 6 speed
Gone: M3 E93 Silverstone II over Bamboo
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