The K&N High‑Flow drop‑in air filter for Frontier 2.5L diesel is a washable, reusable replacement that improves airflow and helps protect the engine. Layered, oiled cotton media captures contaminants while allowing strong flow, and the filter installs into the factory airbox for simple replacement. K&N backs the product with a No‑Hassle lifetime limited warranty and notes reduced landfill waste from fewer disposable filters.
K&N Replacement Air Filter FRONTIER 2.5L DIESEL