Mine was the downpipes rattling against the subframe FYI.
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Mine - 2008 E90 335i Black Sapphire Metallic 6MT | New OEM Turbos @ 111k| Cobb Stage 2 LT Sport | Full Stainless Steel Akrapovic Exhaust | 5'' Stepped FMIC | VRSF Catless Downpipes| 19in BBS CH-R Matte Black | aFe Stage 2 Air Intake and air scoops| Mishimoto OCC| M-Tech Front Bumper
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