The Radium Engineering fuel pressure gauge kit for 2008–2017 Subaru WRX STI includes an 8AN ORB to 1/8NPT female adapter and a 90-degree M/F 1/8NPT elbow fitting for installation versatility. The gauge assembly is intended to monitor fuel pressure accurately and integrates the supplied adapters to work with common high-performance plumbing configurations on the specified WRX STI models.
Radium Engineering 08-17 Subaru WRX STI Fuel Pressure Gauge w/ 8AN ORB Adapter