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The K&N Drop-In high-flow air filter is a washable, reusable replacement engineered with layered, oiled cotton media to improve airflow and help increase horsepower. It installs directly into the factory air box as a direct-fit replacement. Backed by K&N's No‑Hassle Lifetime Limited Warranty, this unit is sized for Nissan Altima L4‑2.5L applications from 2013–2018.
K&N Replacement Filter 11.438in O/S Length x 11.375in O/S Width x 1in H for 13 Nissan Altima 2.5L
