Reddit reviews K&N Engine Air Filter: High Performance, Premium, Washable, Replacement Filter: 2009-2017 Hyundai/Kia (Azera, i45, Sonata Hybrid, Sonata, ix35, Santa Fe, K7, K5, Optima, Sorento, Sportage R), 33-2448

ULTIMATE LONGEVITY: 10-Year/Million Mile Limited Warranty protects for the life of your vehicle.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.