K&N Filters

Your Harley breathes better with a K&N. Founded in Riverside, California by Ken Johnson and Norm McDonald, K&N built its name answering one demand from racers: an air filter that flows more air, protects the engine, and never needs throwing away. That original High Flow design has grown into a filtration standard trusted on cars, trucks, and motorcycles worldwide, and it still does exactly what it was built to do on a V-Twin.

What K&N Filters Makes

K&N makes washable, reusable high-flow filtration - the company introduced the washable performance air filter in 1969. The line covers drop-in replacement air filters, complete air cleaner and intake assemblies, oil filters, and the cleaning and re-oiling products that service them. What we list from K&N Filters moves as the catalog moves.

Why Riders Choose K&N Filters

Where a disposable paper filter chokes airflow, a K&N uses multiple layers of oiled cotton gauze woven between wire mesh to move dramatically more air while still trapping dust and debris. On a stock Harley engine that typically translates to crisper throttle response and stronger low to mid range pull, with independent testing commonly showing gains in the range of 1 to 5 horsepower. The payoff riders feel most is an engine that responds quicker when you roll on the throttle.

Built to Last the Life of Your Bike

A K&N filter is washable and reusable. Instead of buying a new filter every service interval, you clean it, re-oil it, and put it back in. The pleated media offers a large filtration area for long service intervals, and durable coated top plates resist corrosion for years of use. K&N backs its washable engine air filters with a lifetime limited warranty and its air intake systems with a 10-Year or Million Mile limited warranty. Warranty terms and coverage are set by K&N.

Direct Fit for Harley Applications

K&N filters are engineered to OE specifications for each application, with model specific base seals and sealing beads for an airtight fit in the factory airbox. Most are a true drop-in replacement that installs in minutes with no fabrication, and they arrive pre-oiled and ready to run. Confirm the correct filter for your model and year on the product page before ordering.

Fitment

K&N Filters fitment is specified part by part, and coverage is not uniform across platforms or model years. Check that the fitment list on the product page names your model and year before ordering.

Throttle Body And Motor Decide It

Carbureted, Delphi/CV injection and throttle-by-wire intakes all mount differently, and Evo, Twin Cam and Milwaukee-Eight have different mounting patterns and breather arrangements. A freer-flowing intake also changes the air/fuel ratio, so most manufacturers recommend a tune alongside - see Tuners & Fuel Systems. Emissions statements belong to the manufacturer.