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2019 BMW Z4 Air Filters - Custom Fit

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Latest Customer Reviews

K&N Air Filters Reviews


Not too big not too small

Reviewed By Paul B (Port Saint Lucie, FL) Reviewed for a 2008 BMW Z4 —2/23/2018 4:50 AM

K&N filters air to the proper degree. Paper filters restrict air flow by filtering particles too small to make any real difference. My mechanic says after cleaning don't bother to re-oil because it's almost impossible to replace the very light mist of oil of the original correctly. The multiple layers of cotton gauze are sufficient to protect your engine.

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K&N XStream Round Custom Air Filter Assemblies Reviews


mo' power

Reviewed By THOMAS L (EL CAJON, CA) Reviewed for a 1978 Chevy Corvette —2/8/2018 8:08 PM

I could actually feel the increase in power

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