This K&N air filter is perfect for motorcycle racing on closed - course tracks. It's made for racers who want to get the most out of their Suzuki GSXR600 or GSXR750. The filter has two layers of cotton, which allows for great airflow. It's washable and reusable, so you can keep using it. It comes with a one - year limited warranty. This product is only for racing and won't work well for regular street use.