View Single Post
      12-06-2012, 09:29 PM   #15
maxdriver
Private First Class
maxdriver's Avatar
2
Rep
142
Posts

Drives: 2014 535x,370Z coupe,G37 sedan
Join Date: Nov 2011
Location: USA

iTrader: (0)

No clue if it improves performance. I bought it for the freaking sound! It's a BMW part....can't imagine that it lowers performance....having said that, my 135i screams...performance and sound wise....!!!