Reviewed By rob d (Blaine, WA) Reviewed for a 2003 BMW Z4 —5/28/2013 7:41 PM
Swapped out the filter. 1'st noticed the size difference and how the stock filter will restrict air flow. You can hear the air flow difference.
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Reviewed By Norman C (GOLDSBORO, NC) Reviewed for a 2011 BMW Z4 —11/29/2012 2:45 PM
Good-bye to a good deal of throttle hesitation on my Z4. Running some other stuff through my recently-purchased used car's fuel system (to get it back in shape, too); but the added air flow vs. the brand new OEM filter is performance-obvious (a good buy). I really like the fact I do not have to re-oil the high-end aFe Pro-Dry air filter, which itself isn't difficult ... just one less thing I have to do.