Upgrade your vehicle's exhaust system with this Electric Remote Silencer Cut-Off Exhaust, designed to give you convenient control over exhaust sound and flow. The system uses a remote-controlled valve to switch between a quieter exhaust setup and a louder, more aggressive exhaust note. The listed kit includes a 63mm (2.5-inch) stainless-steel valve, vacuum pump, two remote controllers, vacuum tube, elbow, and joint pipe; professional installation is recommended.