Universal Electric Exhaust Valve 3" Stainless Steel CNC Cutout – Remote Controlled Adjustable Exhaust System Enhancing Engine Sound & Performance The exhaust port is the opening in the exhaust system between the head and the muffler. This opening is usually covered and directs all of the vehicle's exhaust through the muffler and out the tailpipe. This set of electric exhaust cutout valve is suitable for most 3in/76mm exhaust systems.
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