K&N performance High-Flow Air Filters are engineered to improve engine performance by increasing airflow up to 50%. Unlike disposable paper filters which must be frequently replaced K&N Air Filters are washable reusable and engineered to last for the life of your motorcycle ATV or Side-By-Side vehicle. K&N air filters are backed by our famous 10-Year/Million Mile Limited Warranty and they provide an environmentally friendly way to reduce landfill waste by avoiding disposable filters. Engineered to fit easily into your factory air box installation can be completed in a matter of minutes! K&N develops and tests each product on the world’s toughest race tracks so we can bring the highest level of performance for your journey. Join the millions of customers who have saved money and improved performance by upgrading to K&N filtration. Fitment Information: 2000-2019 SUZUKI DRZ400S; 2005-2019 SUZUKI DRZ400SM; 2000-2008 SUZUKI DRZ400E; 2000-2004 SUZUKI DRZ400; 2003 KAWASAKI KLX400R; 2003 KAWASAKI KLX400SR