The K&N 57-3058 Performance Intake Kit is designed to increase horsepower by up to 10% and provide more usable power throughout the RPM range. It is estimated to gain 1754 hp and is easy to install within 90 minutes. The kit is CARB exempt, street legal in all 50 states, and comes with a million mile limited warranty. It replaces the air box and uses a washable, reusable filter.