Exhaust outlet for transom mounting. Install through the transom of your nitro or gas hull, fasten with included screws and nuts, slip a silicone tube over the dump inside the hull, and slip the stinger of the pipe into the silicone tube. Silicone can be fastened with tie wraps or our coupler clamps. A clean finish for running your pipe inside of a hull. Great for Nitro and Gas Unlimited Hydros!