The split-flow flex fuel sensor adaptor from Radium Engineering provides a perfect solution for adding a flex fuel sensor to highly tuned vehicles. For the highest accuracy and best response times flex fuel sensors should be fitted to the feed line to the injectors but this can cause a drop in fuel pressure of up to 10 Psi. This adaptor is designed to provide full fuel pressure and flow while still allowing the sensor to read accurately at high and low fuel demand.Provides a compact solution for installing a flex fuel sensor in the injector feed lineDoes not limit fuel flow or pressureNeater and more compact solution to using Y pieces and extra fuel hoseCompatible with GM sensor part number 13577429 and 13577394 (this sensor require slight modifications to fit).Please note: Sensor is not included