SPD Flex Fuel Sensor Adapter AN10 - Full Flow Efficient full-flow solution for flex fuel sensors at high fuel flow rates This compact full-flow solution makes it possible to install the flex fuel sensor in the supply line even at very high fuel flow rates. The result is more stable and reliable readings, while also enabling the use of returnless fuel systems in combination with flex fuel sensors.  AN10 ORB inlet and outlet ports Viton O-rings for optimal sealing and long service life Matte black finish for a clean and durable appearance