K&N Engineering 2002-07 WRX/STi Drop-In High-Flow Air Filter

K&N Engineering Drop-In Air Filter — Washable, Reusable, High-Flow Brand: K&N Engineering For 2002–2007 WRX/STi. This listing is for one drop-in air filter. Upgrade your engine breathing with the K&N Drop-In High-Flow Air Filter, engineered to deliver improved airflow, increased horsepower, and long-lasting protection. Precision-layered, oiled cotton media traps contaminants while allowing maximum air delivery for optimized performance. Key Features High-Flow Design: Engineered to increase airflow and enhance throttle response and horsepower. Washable & Reusable: Durable construction designed to last the life of your vehicle—clean and reuse instead of replace. Superior Filtration: Multi-layer oiled cotton media captures dirt and particles without restricting air intake. Direct Fit: Drop-in replacement fits your factory airbox for quick, hassle-free installation. Backed Warranty: Supported by K&N’s 10-Year/Million-Mile Limited Warranty for long-term confidence. Benefits Experience improved engine efficiency and potential gains in horsepower while reducing ongoing maintenance costs. The reusable filter cuts waste and gives consistent performance over time. Install easily — perform better — save money. Choose K&N’s most popular performance filter for reliable airflow and protection every mile.