Re: deep rumbling on 929
An engine doesnt need ram air fitted to have induction noise. Think of all them honda civics running around with pod filters on them. You can hear the induction roar from a mile away.
After I fitted my KnN filter, the first thing I noticed was the massive increase in induction noise. It is more noticeable because the filter breathes alot easier than OEM filters, which allows more air down the stacks, thus making more power. If you are so concerned, refit the OEM filter and see if that changes it. Personally, I love the sound of that deep roar at full throttle!