RUGGED CONSTRUCTION: K&N Advantage Plus Air Filters are manufactured with durable, premium materials to last for up to 24,000 miles of use. EXTENDED LIFE 24K: K&N Advantage Plus Air Filter provides 2x longer life compared to standard 12,000-mile filters. SUPERIOR FILTRATION & PROTECTION: K&N uses a specially-treated premium media that provides up to 99.5% efficiency to protect your engine. IMPROVE ENGINE PERFORMANCE: The specially-treated filter media provides improved airflow to your engine for premium engine performance (Compared to K&N Advantage 18k mile air filters) REPLACE EVERY 24K Miles: Engine air filter only needs to be replaced every 24,000 Miles under normal highway driving conditions (2 years based on the average miles driven per year of 12,000 miles)