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The K&N drop‑in air filter for Lexus GS400 (1998–1999) replaces the factory element with layered, oiled cotton media intended to increase airflow and help add horsepower while protecting engine internals. It installs into the stock air box for a simple swap, is washable and reusable to reduce disposable waste, and is supported by K&N's No‑Hassle Lifetime limited warranty for long life.
K&N Replacement Air Filter LEXUS GS400,1998-99
