Radium Engineering Fuel Rail Plumbing Kit - Subaru WRX (08-14) STI (08-21) Forester FXT (08-13) Legacy GT (04-09) - Stainless 10 or Microglass 6 Micron Filter

Fitment Information

• Subaru Impreza All (2008-2014)
  
• Subaru Forester all (2008-2014)
  
• Subaru Legacy All (2005-2009)
  
• Subaru Outback All (2005-2009)
  
• Subaru STi (2015-2021)
• This 2 models 
• Subaru Forester XT (14-18) and Subaru WRX (2015-2021) requires extra components described below. 
  
  • The OEM fuel tanks may be the same, but the OEM fuel units are completely different. To adapt the OEM fuel level sensor to the Radium fuel pump hanger, 20-0850 FUEL LEVEL SENDER ADAPTER, FA20 is required.
    
  • The OEM fuel system is returnless. The fuel pressure regulator that is normally inside the OEM fuel unit is discarded. An aftermarket FPR is required.

Specifications

• All components are safe to use with E85
  
• Microglass fuel filter element or Stainless steel fuel filter element
  
• Filter bracket mounts to the chassis with no drilling or permanent modifications
  
• Stainless steel hose construction
  
• required when using the Radium Fuel Pump Hanger.

PREVENTING STARVATION

• To help prevent starvation, the anodized aluminum collector box keeps fuel trapped around the pumps. Furthermore, there are two 1-way fill valves on the collector box thats allow fuel in but not out. Each fill valve flows 355LPH (710LPH total).
• The included a venturi jet pump features an integrated PRV (pressure relief valve). This transfers fuel from the passive side of the OEM fuel tank to the active side where the pump(s) reside. This unique design creates suction without restricting the return line.
• Furthermore, all returning fuel from the FPR return and the crossover hose enter the collector box through a one-way duckbill valve keeping it full. The duckbill valve prevents back flow and reduces fuel spray noise. 

PLUMBING

• As described below, there are 3 external ports:
  
• FUEL PUMP OUT
  
  • This port is thread tapped for 8AN ORB (3/4"-16). A SAE quick connect male adapter fitting is preinstalled for connecting to the OEM feed line.
    
• FPR RETURN
  
  • This port is thread tapped for 6AN ORB (9/16"-18). A SAE quick connect male adapter fitting is preinstalled for connecting to the OEM return line. 
    
• CROSSOVER
  
  • This port is thread tapped for 6AN ORB (9/16"-18). A SAE quick connect male adapter fitting is preinstalled for connecting to the OEM crossover line. 

• An external fuel hanger plumbing kit is no longer required if the factory fuel lines are reused (as shown above). Each fuel pump merges internally into a single port. External fuel line merging is no longer required. NOTE: a post pump fuel filter is still required.

ELECTRICAL

• Single pump applications can reuse the OEM fuel pump controller wiring, as shown below. However, it is recommended to upgrade the OEM wiring to get the maximum potential out of these high current, high flow pumps. Fuel pump wiring kits can be purchased HERE. Select qty1 for single pump applications and qty2 for dual pump applications.
• Unlike compact multi-pin electrical connectors, these custom designed stainless steel electrical studs easily handle the high current demand from aftermarket fuel pumps. These serviceable connections are hermetically sealed and impervious to all standard and exotic fuels. The low profile design keeps all wiring tucked nicely underneath the OEM access cover. Each pump has it's own dedicated +/- electrical connections. Anti-rotation electrical terminals are now featured as well. Nonconductive anodized acorn nuts are provided to prevent any accidental short circuits. All necessary electrical hardware is provided for external wiring connections.
• The factory fuel temperature and level sensors are re-used. The collector box permits mounting for level as shown above. The internal pump bracket permits mounting for the temperature sensor. Consult the installation instructions link at the top of this page for more details. 

PUMP CONFIGURATIONS

• These kits are compatible with 1 or 2 fuel pumps. They are suited, but not limited, to the following:
• 20-0782-00
  
  • Walbro F90000267
    
  • Walbro F90000274
    
  • Walbro F90000285
    
  • Walbro F90000295
• 20-0780-00
  
  • Walbro GSS342 255lph
    
  • AEM 50-1200 (Pump kit includes filter)
    
  • AEM 50-1230 (Pump kit includes filter)
    
  • AEM 50-1235 (Pump kit includes filter)
• 20-0781-00
  
  • Deatschwerks DW400 (Pump kit includes filter)
• These pumps do NOT feature a check valve. If this is required, purchase 20-1533. 
  
• These pumps do NOT feature a check valve. If this is required, purchase 20-1534. 

What's Included? 

• Includes a filter, hose, fittings, hardware as well as the post-pump filtration

Product Description

This plumbing kit allows for easy installation of the Radium in-tank fuel hanger for your WRX and STI. It includes new high-flow feed and return lines as well as a high performance fuel filter. They add the necessary post pump filtration required when using the Radium Engineering fuel pump hanger. An 8AN PTFE feed line routes from the Radium hanger up to the Radium fuel filter mounted under the vehicle. From the filter, an 8AN rubber hose is supplied to go to the fuel rails.

A 6AN rubber return hose is included that routes fuel from the fuel pressure regulator back to the fuel pump hanger. The billet aluminum retainers are included to secure the fuel lines.