BMW 135i N55 OEM Exhaust Mod

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Published on ● Video Link: https://www.youtube.com/watch?v=ypQUx4oUxHI



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Sound comparison between standard OEM exhaust and modified rear muffler, on this otherwise completely standard 135i. The modification involves opening the rear muffler and blocking up some holes.

Pictures of process here: https://imgur.com/a/vaCc0

Car is a 2010 BMW 135I E88, with N55 engine and 7 spd DCT.







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