3" Electric Exhaust Catback/Downpipe Cutout Valve System Kit with Remote Dyno Proven to Instantly Increases 10 -20 Horsepower Electrically Controlled Exhaust Valves Outflow; Simply with a Button on the Remote High Torque Electric Gear Motor Specifically Manufactured to Withstand High Temperature and Vibration Increase Engine Output and Efficiency Inlet/ Major Piping Diameters: 3"/ 3" (76mm); Wireless Remote Control Included