K&N Engine Air Filter: High Performance, Premium, Washable, Replacement Compatible with GRAVELY/KOHLER (CH11, CH12.5, CH13, CH14, CH15, KT17, Square Style, KT19, KT21, M16, M18 M20), E 4522

ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10% EASY INSTALLATION: Pre-oiled and ready to drop into your factory air box. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. A K&N filter will last longer than 10 disposable filters WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants LOW-MAINTENANCE DESIGN: 50,000 miles before your first cleaning under normal highway driving conditions HIGH QUALITY: Made in America RACE TESTED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle