Thread: E9X 325i (N53) Gutted back box?
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      07-03-2023, 11:38 AM   #4
Keith325i
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Drives: 08 325i e93
Join Date: Feb 2023
Location: Ireland

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I did something similar with my 325i. I got an exhaust shop to replace the back box with an aftermarket round back box. It sounds great. Not too loud and not obnoxious at all. Nice and quiet at idle but screams at 4k rpm. Reversible too.
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