Quote:
Originally Posted by f32-440i
As far as I understand you must fit the M performance exhaust in order to get the M performance carbon tips. The M performance exhaust adds ~25bhp, hence the increase.
Not telling insurance isn't an option  |
25hp from a muffler...you sure about that? On all other models the muffler is purely for sound. Also, you can check here
http://www.burgertuning.com/exhaust_tips_for_BMW.html
And at least on the f30 335 you could get factory black (I may do that myself)
Are you in cambridge ma?