Discharges static electricity and increases exhaust efficiency. By connecting the ground wire, the static electricity generated inside the muffler and reducing exhaust resistance, it has the same effect as when wearing a large diameter muffler. Exhaust gases running inside the muffler generate static electricity to prevent smooth exhaust. Muffler grounding removes static electricity, improves exhaust efficiency and increases power, torque and response. (Specifications) Total Length: 9.8 inches (25 cm); Material: Copper, braided, silver plating; Terminal: 0.3 inch (8 mm) / 0.4 inch (10 mm); Hole size: 0.4 inch (10 mm); Note: This is a brand new product. The price is for 1 piece. ● Packaging is not included, so it can be placed directly into an envelope.