The Specialty Z E85 Content kit utilizes the factory EVAP connection, simplifying installation. Specialty Z had a mold made to properly do this. A factory Nissan return hose is included in the kit already attached to a flex fuel sensor. You will be able to view your E percentage directly on the factory screen after the proper tune is uploaded to the ECU (ECUTek). Kit includes: • Fuel Return Hose with Flex Fuel Sensor • Zeitronix ECA-2 • Harness' for the sensor and ECU side For more details, please contact us.