Aeromotive Modular Fuel Pressure Regulator - 2 x AN-06 Outlet and 2 x AN-10 Inlet PortsCapable of feeding single or dual carburetors and 1, 2, 3 and 4 or more stages of nitrous, all with total control of unique fuel pressures at every distribution point. For the ultimate nitrous fuel system, it? s easy to combine Aeromotive? s Pro Stock 2 or 4 port regulators with the new Stackable Regulators, where all flow and pressure control is consolidated for a much cleaner, lighter package. Screw the combined Stackable Regulators to the inlet of