A cleaner way to convert your cooling system to AN without welding, hose clamps, or extra hose connections. Whether you are trying to avoid inline splices, step between different water neck sizes, or simply want fewer connections in your cooling system, the AutoPlumb Water Neck Adapter lets you connect directly to your existing radiator, water pump, or thermostat housing. Available in -16AN and -20AN for a clean, removable, and reusable AN connection. Shop at autoplumb.com #ANFittings #CoolingSystem #LSSwap #RadiatorHose #CustomCarBuild