1. The dual valve exhaust system design allows you to easily control the exhaust volume and airflow for high performance. 2. Excellent material and delicate workmanship for excellent quality and durability. 3. Designed to improve the performance and sound of your vehicle at the touch of a button. 4. Easy installation, will open the exhaust for throaty rumble. 5. Wireless pilot is convenient and simple to operate, more practical to use. Item Type: Electric Exhaust Valve Material: Stainless Steel Color: Silver Installation Diameter: About 63mm/2,5 inch Installation Method: Direct Replacement Connection Type: Welding Operating mode: pilot (incl. battery) Assembly: universal List of packages: 1 x Electric Exhaust Cutoff with Double Valve 1 x wireless pilot 1 x Controller 3 x Power Cord Note: 1. Please double check the size of the electric exhaust valve to make sure your vehicle's exhaust valve will fit. 2. This is a DIY kit, remember that you will have to solder yourself to the exhaust system or go to the install workshop. 3. To avoid the engine going out, do not press the button for a long time. Frequent getting stuck affects the life of the engine transmission. Full opening or full closing takes only 2-3 seconds. Please be aware: