K&N Engineering Custom Round Air Filter 14in OD x 12in ID x 4in H

K&N Engineering Custom Round High-Flow Washable Air Filter E-3730 This listing is for one custom round air filter. Brand: K&N Engineering — Model: E-3730 Improve engine breathing and performance with the K&N Custom Round High-Flow Washable Air Filter E-3730. Engineered with layered, oiled cotton media, this reusable filter increases airflow while effectively trapping dirt and contaminants to help protect your engine and boost horsepower. High-flow design: Optimized pleated media for improved airflow and throttle response. Washable & reusable: Designed to last the life of your vehicle — clean and reinstall instead of replacing. Dimensions: 14in OD, 12in ID, and 4in height. Durable & backed: Built to perform and covered by K&N’s 10-Year/Million Mile Limited Warranty. Upgrade to the E-3730 to enjoy superior airflow, long-term value, and reliable protection. Ideal for enthusiasts seeking a low-maintenance performance upgrade with proven results.