K&N 63-1122P Harley Davidson Performance Intake Kit Estimated horsepower gain of 12.92 HP at 4612 RPM Designed to improve throttle response and engine sound Easy to install, usually in 90 minutes or less Washable and reusable lifetime air filter Not legal for highway use in states adopting California emission regulations Lasts up to 100,000 miles before service is required (depending on driving conditions)