Exhaust Bung

2 and 4-stroke compatible thanks to removable 4-stroke bung sleeve; Tapered design fits most exhaust diameters; Silicone rubber core construction is sturdy and durable; Supplied with lanyard for easy removal and storage; Prevents water or contaminates entering the exhaust during cleaning; Directions for use: 1. Ensure the exhaust is fully cooled, 2. For 2-stroke exhaust remove the black silicone sleeve from the bung, for 4-stroke exhaust keep the black silicone sleeve on the bung, 3. Insert and twist the exhaust bung into the end of the exhaust to form a perfect, 4. Carry out your cleaning and maintenance routine and 5. Always remove before starting the engine