Reusable filter dynamically increases air flow and velocity. Dyno-tested and flow-bench designed, kit will add substantial increase to horsepower and torque. Innovative design enhances and accentuates your “V” Twin engine. Complete with breather kit, mounting hardware and micron-fabric raincoat for wet-weather riding. Easy-to-follow instructions included for a do-it-yourself install. Set-back, thin-line design does not interfere with rider’s leg. Maximizes overall performance and fuel efficiency. Made in the U.S.A..