If you're running an off-road H-pipe or X-pipe, these MIL eliminators will shut off the Check engine light and improve performance. MIL which is short for Malfunction Indicator Light Eliminator shuts off CELs by blocking the codes generated by the rear O2 sensors when running an off road mid-pipe or some mid-pipes with ultra high-flow cats.
Plug-in Mustang MIL Eliminators (96-04 GT)