[drfullet87]

Just wanted to share my experience. I have a 2014 335 x drive msport line. Added mppk and mpe today. Install took about 7 hours. I noticed burbles and improved exhaust sound immediately in sport+. For those who can't hear yours, get your hearing checked or return to dealer I suppose.

Mppk performance bump is definitely there, but this car was a rocket without it so its not night and day. We will be able to push it harder when summer hits. Cost me about 3,700 with labor. Worth it? Maybe not, but I wouldn't be able to stop thinking about it if I hadn't done it...so for me yes. Can't wait to see if the exhaust gets louder after break in. Oh and the parts arrived within about 5 days of me ordering.