Panel filter in Performance Posted September 5, 2006 · Report reply hi guys. i got a bmc panel filter in my z4 and only i can tell is my muffler (not orginal) sounds go deeper. U won't feel any diff when u driving. No air sucking sound at low rev but little when high rev.
Panel filter
in Performance
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hi guys. i got a bmc panel filter in my z4 and only i can tell is my muffler (not orginal) sounds go deeper. U won't feel any diff when u driving. No air sucking sound at low rev but little when high rev.