The high-flow, gold orifice provides metering of fuel induction cleaner during the vacuum induction service. The gold orifice provides a higher flow rate of the fuel induction cleaner for larger, V-6 and V-8 engines. The small, side port draws a precise amount of air into the vacuum stream generating a fine mist that reduces the potential for liquid drop-out and puddling. Requires one of the vacuum tips (not included). The high-flow, gold orifice is an option for the FVT16.