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The K&N drop‑in air filter for Ford F‑150 Lightning (1999–2004) and F‑150 Harley‑Davidson (2002–2003) uses layered oiled‑cotton media to improve airflow and help increase horsepower while protecting the engine. This washable, reusable replacement installs into the factory air box for easy fitment and reduces disposable filter waste. Backed by K&N's No‑Hassle Lifetime limited warranty for durability.
K&N Replacement Air Filter FORD F150 LIGHTNING 5.4L 99-04, F150 Harley-Davidson 5.4L 02-03
