K&N Engineering Drop-In Air Filter E-3740 High-Flow Washable Reusable

K&N Engineering Drop-In Air Filter E-3740 — High-Flow, Washable, Reusable Boost performance and save over time. The K&N E-3740 drop-in air filter is engineered to increase horsepower and improve acceleration by reducing intake restriction and delivering higher airflow to your engine. Key Benefits High-flow performance: Oiled, multi-layer woven cotton media increases airflow for better throttle response. Superior filtration: Advanced cotton layers trap contaminants while maintaining flow. Washable & reusable: Clean and re-oil the filter—no frequent replacements required. Long service interval: Up to 50,000 miles between cleanings under normal conditions. Cost-effective: One K&N filter replaces many disposable filters over its lifetime. Direct fit: Simple drop-in installation designed to fit factory air boxes for older Ford Scorpio and Peugeot models and select other applications. Why Choose K&N E-3740 This filter combines durable construction with engineered airflow characteristics to deliver reliable performance gains and long-term value. Ideal for drivers who want improved engine breathing without complex modifications. Backed by K&N's reputation for quality and reusability.