![]() ![]() ![]() The optional pressure guage kit 20-0386 can be installed into the unused 8AN ORB port on the regulator, as shown in the attached photos. Also included are vacuum hose and fittings to re-route the vacuum reference line from the #4 cylinder runner to the intake manifold plenum for a more stable vacuum signal. The kit installs in the same location as the OEM fuel pressure regulator. PRESSURE GAUGE: Radium: Fuel Pressure Gauge 0-100psi £50.67. AMS Fuel Pressure Regulator Kit In Black EVO X for Mitsubishi EVO X Legal only for use in competition vehicles which may never be registered, licensed. The Radium Fuel Delivery System is E85 safe. Interchangeable orifices allow the user to tune the regulator for any fuel pump flow. FUEL RAIL FITTING: 8AN ORB TO 8AN Male Fitting £10.09. The fuel pressure regulator return uses a short -6AN prefabricated PTFE hose and adapter fittings (return kit) to connect to the factory fuel feed line, using it as the return line. The Radium Fuel Pressure Regulator offers adjustment from 20psi-up with a 1:1 vacuum reference. The Radium Direct Mount Regulator (DMR) is a compact high peformance adjustable EFI fuel pressure regulator designed with a unique highly versatile mounting system. This is the preferred fuel line routing by Subaru tuners trying to address stumbling issues. The Radium FPR kit replaces the factory regulator and re-routes fuel to cycle through the engine's rails before reaching the regulator and returning to the tank. Fuel is only routed to the engine when there is demand. Example 1: Vehicle: Mitsubishi EVO OEM Base Static Fuel Pressure: 43. The factory STi fuel line routing uses a quasi dead-end system that circulates fuel through the regulator, bypassing the engine. Any dynamic fuel pressure created by a rising-rate FPR outside of this range is acceptable, but only when the base 'static' fuel pressure is set within these ranges and the vacuum/boost reference line is connected. ![]() This kit is designed for use in the USDM 2008-2019 Subaru WRX STi (EJ257 only) and replaces the OEM fuel pressure regulator and damper assembly, shown below. ![]()
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