K&N Universal Air Filters

K&N's Universal Air Filters are designed and manufactured for a wide variety of applications. Regardless of the angle, offset diameter of the air intake, there is a K&N Universal air filter for your equipment.  All filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16" (1.5mm) to fit in-between sizes. K&N Universal air filters are available in round, tapered (cone style) and oval designs, for just about any special application.  Select a universal filter type below to view the sizes that are available.

Search for a Universal Air Filter by Dimension


Select a universal air filter type below to see a list of all air filters for that type.

K&N Universal Air Filters


Round Straight

Round Straight Universal Air Filters

Round Tapered (Cone Filter)

Round Tapered (Cone Filter) Universal Air Filters

Oval Straight

Oval Straight Universal Air Filters

Oval Tapered

Oval Tapered Universal Air Filters

Dual Flange Straight Oval

Dual Flange Straight Oval Universal Air Filters

Dual Flange Tapered Oval

Dual Flange Tapered Oval Universal Air Filters

Custom End Cap (including inverted)

Several Styles

XStream® Air Flow Top

Several Styles

Apollo Universal Cold Air Intake System

Enclosed Round Tapered


Several Styles


K&N Air Filter PreCharger Wraps

K&N Custom Air Filter Program

PreCharger and DryCharger Filter Wraps

Airforce Foam Pre-Cleaner Filter Wraps

These universal air filters are legal ONLY for racing vehicles.  Not applicable, nor intended for use on emission controlled street or highway vehicles.

A K&N® universal air filter is specially designed for clamp-on applications such as cold air intakes, race engines, show vehicles, or industrial applications. This product is not street legal on vehicles with regulated emission control systems unless it is used as a direct replacement air filter for a street legal intake system. This high-flow washable universal air filter is designed to increase horsepower and torque. 

Hundreds of K&N® universal air filter sizes are available for almost any application.