![]() This secures to the front 1/8"-27 NPT port of the fuel pressure regulator housing. Radium also offers an optional fuel pressure gauge (shown below). These come assembled with the Bosch regulator unit installed in the housing, as shown below. This option includes everything needed with the exception of the regulator top, as shown below. If a regulator top is not needed (already have one from another source), select Radium 20-0014. If a higher flowing pump is used, the minimum pressure ratings may be higher than advertised.For applications with more pump flow, consider a high flow fuel pressure regulator. These Bosch regulator tops are vacuum referenced with a 1. These Bosch units are found in many applications, including: Alternatively, Radium offers two GENUINE Bosch regulator tops: 3.0 Bar (43.5 psi) static and 4.0 Bar (58.2 psi) static. These FPRs are tested using a common Walbro 255lph pump. This universal Radium Fuel Pressure Regulator (FPR) is built around the common OEM Bosch regulator inserts. The Radium Fuel Pressure Regulator offers adjustment from 20psi-up with a 1:1 vacuum reference. This is the preferred fuel line routing by Subaru tuners trying to address stumbling issues. NOTE: The exact min, static, and max pressures are influenced by the flow rate of the fuel pump being used. 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. ![]() There is also a 1/8 NPT female port for a gauge, pressure transducer, etc. Each FPR housing is laser etched and anodized for a superior finish. I get the harmonics involved could play havoc with the fuel pressure gauge, but I also had this lean spike at clutch. Its job is to smooth out the pulses generated by the opening and closing of the injectors effectively killing the sine wave in the fuel system. The 6AN male return port is integrated into the housing. The solution: Radium Engineering makes a universal inline fuel pulse damper. The two main high pressure ports are threaded for 6AN ORB. The regulator top is secured with a stainless steel snap ring and can easily be removed using snap-ring pliers. The compact Radium Engineering billet aluminum FPR housing provides a convenient package for plumbing and mounting. These Bosch regulator tops are vacuum referenced with a 1:1 ratio and are NOT adjustable. These Bosch units are found in many applications, including:Īlternatively, Radium offers two GENUINE Bosch regulator tops: 3.0 Bar (43.5 psi) static and 4.0 Bar (58.2 psi) static. This universal Radium Fuel Pressure Regulator (FPR) is built around the common OEM Bosch regulator inserts. ![]() **This product is not recommended for fuel pumps with more than 255 LPH (at 3 Bar) rated flow**
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