How to use: First, follow the included installation guide to install the Cobb Fuel Pressure Sensor Kit on your 2015 - 2021 Subaru STI. After installation, connect it to the Custom Accessport monitor. The kit will start using the existing factory inputs to monitor fuel pressure automatically. Things to note: You need to perform custom tuning as required. Also, this kit is essential for COBB NexGen Flex Fuel OTS Maps, so make sure you have the appropriate setup. Maintenance advice: Regularly check the connectors to ensure they are in good condition. Keep an eye on the fuel pressure readings on the monitor. If you notice any abnormal readings, it might indicate a problem with the fuel system and you should have it checked out.