Dyno-tested for substantial increases in horsepower and torque by 8% to 10%. Patented design alters the velocity stack, which allows unrestricted airflow to the engine. The system clearly integrates under the fuel tank, replacing the ugly and restrictive stock airboxes. Gets rid of the restrictive stock airbox and filter, and replaces them with a high-quality reusable, high-flow filter for long life. Includes our 'Slasher' style, re-jetting is not required. Also includes a unique relocation mount/bracket for FI sensors/ignition coils. Comes with easy-to-follow instructions for a do-it-yourself installation. Made in the U.S.A.