VEVOR 3 Inch 76mm Electric Exhaust Catback Downpipe Cutout Y Cut Out Valve System Switch with Remote Inlet/ Major Piping Diameters: 3"/ 76 mm Electrically Controlled Exhaust Valves Outflow; Simply by Flipping the Switch Fitment:Universal Application for Any 3" Piping Diameter Exhaust System Dyno Proven to Instantly Increases 10 -20 Horsepower Electrically Controlled Exhaust Valves Outflow; Simply with a Button on the Remote