K&N DU 9321 Replacement Air Filter

INCREASED HORSEPOWER AND ACCELERATION: K&N's 4 layer Oiled Cotton Gauze enables maximum airflow whilst maintaining maximum filtration. WASHABLE AND REUSABLE: designed to last the lifetime of your vehicle. CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (5 years based on the average miles driven per year of 15,000 miles) REUSABLE K&N FILTERS SAVE YOU MONEY: A K&N washable, reusable air filter will save you up to £125 vs. purchasing multiple disposable filters (compared to MSRP in GBP of corresponding OE filters for 200,000 miles of highway driving) EASY, FAST FIT: Fits directly into OEM air box.