View Single Post
      02-01-2013, 07:25 AM   #2
Just one more taste...

Drives: 2010 135i
Join Date: Aug 2012
Location: Shirley, MA

Posts: 1,419
iTrader: (14)

It's one of those things you can check for easily by logging. I reverted back to stock airbox after 2 different intakes and aside from the noise, I notice almost no difference in performance. I think the vacuum sound is sort of a placebo effect.