It has been bolted on but never ran. Misplaced the o-ring but have a gasket in the box. Better Air Flow for More Power: This 80mm upgrade will improve your Mustangs throttle response and horsepower. It’s the perfect starting point for future modifications. In addition, spacers are offered as an option in combination with our throttle body. Exceptional Quality: Accufab’s quality is second to none! This throttle body is CNC machined from 6061-T6 billet aluminum and the exterior is polished to an eye-catching finish. The shafts are also CNC machined from stainless for durability and quality, with brass blades and the highest quality bushings, bearings and screws. Designed and manufactured in the USA by Accufab. Application: This Accufab 80mm throttle body, or 80mm throttle body in combination with spacer is specifically designed for use on the 1986 – 1993 Ford Mustang .