The K&N High-Flow drop-in air filter for Ford Crown Victoria and Mercury Grand Marquis (1986–1991) replaces the stock element with layered, oiled cotton media designed to improve airflow and trap contaminants, supporting increases in horsepower and overall engine protection. Washable and reusable, the filter is intended to last the vehicle’s life and is covered by K&N’s No-Hassle Lifetime Limited Warranty.
K&N Replacement Air Filter FORD CROWN VICTORIA & MERCURY GRAND MARQUIS 5.0L V8; 86-91