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2020 BMW 4-Series Air Filters - Custom Fit

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Latest Customer Reviews

K&N Air Filters Reviews


Free-flowin!

Reviewed By Anthiny O (HOLTSVILLE, NY) Reviewed for a 2018 BMW 4-Series —4/24/2018 3:36 AM

Installed the K&N filter and immediately noticed a difference, not only in performance, but also fuel economy! Keep it flowin K&N

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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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