K&N Black Synthetic Universal Cone Air Filters

The RU-5171HBK Universal Air Filter Side View
The RU-5171HBK Universal Air Filter with black Drylow synthetic media.

K&N makes thousands of performance air filters for factory vehicles. They also make performance universal air filters for a wide variety of applications. Select a filter for your need based on size and fitment and it will provide excellent airflow and filtration efficiency. These clamp-on filters are made using durable and flexible urethane flanges, with a multitude of lengths, diameters, flange sizes, angles and offsets available.

K&N has added a line of universal air filters with black colored filter media made with their Dryflow non-woven synthetic material. These filters unlike traditional oiled cotton filters do not require oil. The black Dryflow filter media is supported by wire mesh on both sides to help provide durability and strength. Cleaning the filter is extremely easy using K&N’s synthetic filter cleaner and cleaning only needs to be performed when the wire mesh starts to disappear under the dirt.

Some popular K&N black universal air filters are:

  • The RU-5171HBK. This filter has a flange inside diameter of 4”, a base outside diameter of 8”, a top outside diameter of 6.625”, and a height of 8”.
  • The RU-5283HBK. This filter has a flange inside diameter of 4.5”, a base outside diameter of 8”, a top outside diameter of 6.625”, and a height of 8”.
  • The RU-3102HBK. This filter has a flange inside diameter of 6”, a base outside diameter of 7.5”, a top outside diameter of 5.25”, and a height of 6”.
  • The RU-3101HBK. This filter has a flange inside diameter of 6”, a base outside diameter of 7.5”, a top outside diameter of 5.25”, and a height of 7.5”.
  • The RU-5177HBK. This filter has a flange inside diameter of 6”, a base outside diameter of 9”, a top outside diameter of 6.625”, and a height of 7.5”.
  • These filters are backed by K&N’s one year limited warranty and if you didn’t see one here that fits your application, you can search for K&N Universal Air Filters by style and size on KNFilters.com.

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