The K&N Typhoon intake system uses a velocity stack design to force air through a massive K&N high-flow filter and into a cast aluminum intake body. The K&N high flow conical air filter is designed to provide increased surface area and dust capacity. This extra surface area provides even more airflow at lower restriction than a standard K&N OEM replacement filter that is limited to the size of the factory air box. The oversize air filter also captures more dirt increasing the service life before a cleaning is required (up to 100,000 miles). This translates into raw power gains, measured at over 4 wheel horsepower with the K&N intake kit alone! All K&N products are backed by a million mile limited warranty so rest assured you are getting the highest quality product possible.