Edelbrock part # 3829 is a 75mm 50-state street legal (E.O. Number D-215-75) Mustang Throttle Body and EGR Plate for 1986-93 5.0L applications. This Edelbrock TB and EGR plate is designed to replace the stock unit when the 70mm air valve # 3825 is used. It provides no performance gains without the matching air valve. This spacer is an exact replacement of the stock unit in fit and function. This application is ideal for use with our Performer 5.0/Performer RPM 5.0 intake manifolds and The Total Power Package. The 70mm gained 10HP over the stock throttle body.