This part is listed by BMW as BMW part number 18102208804 (18-10-2-208-804) and is described as Genuine BMW Performance Muffler for the E82 128i Coupe and E88 128i Convertible - 2008, 2009, 2010, 2011, 2012, 2013.
The M Performance rear muffler is a subtle but noticeable enhancement to the 128i's very quiet exhaust note. This direct-fit Genuine BMW rear muffler gives an enhanced "note" and sound but removing some of the restriction and sound deadening of the overly-quiet stock 128i exhaust system. If you're looking for a factory "pure" solution that adds better sound and value to your 128i coupe or convertible, this BMW Performance muffler is a great solution. Please note, this is not a "Cat back" exhaust and is just the rear muffler section. It is intended to be installed with your stock center section pipes. This is a cut-and-clamp solution, which was BMW's preferred method of install.
A single cut is made to remove the stock muffler section, and this clamps in its place. It is fully reversible as the stock rear fuller can also be clamped back in place if you decide to revert the car to stock (such as for a lease return.)
For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.
E82 / E88 (08-13) > 128i