Universal adapters for smog tubes, crankcase and valve cover vents. Requires drilling hole in air filter base or valve cover. All come with mounting hardware and gasket.

K&N Marine Style Vent Hose Adapters mount between the top and bottom plates of a custom chrome air filter assembly. Vent adapters accommodate breather hoses without drilling into the filter base.

K&N 85-2003 pre-cut foam insert for 2017-2019 Ford F-250, F-350, F-450, and F-550 Super Duty (DSL models). Replaces OEM foam block for improved filtration in your diesel truck air box. Washable and...

Mounting bracket assembly to securely support K&N Universal Air Filters to your vehicle.

Spring clip clamps for K&N universal air box assemblies - K&N spring clips create a positive seal between the filter, base and top. This package contains 6 black clips that are 3/4 inches wide and 4...

K&N 99-0504 is a 6.5 ounce aerosol can of air filter oil. K&N Air Filter Oil is the only oil specially formulated to work in combination with the cotton fabric in K&N air filter elements providing a...

K&N 99-0516 is a 12.25 ounce aerosol can of air filter oil. K&N Air Filter Oil is the only oil specially formulated to work in combination with the cotton fabric in K&N air filter elements providing...

K&N 99-0533 is an 8 ounce squeeze bottle of air filter oil. K&N Air Filter Oil is the only oil specially formulated to work in combination with the cotton fabric in K&N air filter elements providing...

K&N 99-0551 1 gallon air filter oil for high-volume users or shops. The only oil formulated for K&N cotton air filters to provide superior filtration and long service life.Features:Value 1 gallon...

K&N 99-0555 is a 5 US gallon container of air filter oil. K&N Air Filter Oil is the only oil specially formulated to work in combination with the cotton fabric in K&N air filter elements providing a...

K&N 99-0606 12 ounce pump spray Power Kleen air filter cleaner. Dissolves dirt, old oil, and grime from K&N cotton air filters so they can be rinsed clean with water. Also works as an industrial...

K&N part 99-0621 is a 32 ounce pump spray bottle of Power Kleen Air Filter Cleaner. K&N Power Kleen is the only cleaner recommended to clean K&N cotton air filter elements. K&N 99-0621 Air Filter...