The Radium fuel pump hanger for late model Subaru vehicles replaces the OEM unit and allows the use of 1 or 2 high-flow aftermarket fuel pumps. The system is safe to use with alternative fuels such as E85. The machined assembly mounts in the factory fuel tank using the OEM gasket and replaces the OEM hold-down flange. No permanent modifications are required making installation simple.
Preventing Fuel 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.
1. 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. 2. 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. 3. 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. Each fuel pump merges internally into a single port. External fuel line merging is no longer required.
The Radium fuel pump hanger features custom designed stainless electrical studs that easily handle the high current demand that multi-pin bulkhead connectors lack. These serviceable connections are hermetically sealed and impervious to all standard and exotic fuels. Non conductive anodized aluminum acorn nuts are provided to prevent any accidental short circuiting. Electrical hardware is included for the fuel pump(s) and OEM sensors. Furthermore, the in-tank wiring is insulated with high quality chemically resistant PTFE. The factory temperature sensor and fuel level sender is reused.
1. Single Walbro GSS342 (255LPH) fuel pump installations can re-use the OEM fuel pump wiring. 2. It is recommended to upgrade OEM wiring to ensure the pumps are receiving full power and operating at their full potential. 3. Universal fuel pump wiring kits can be found HERE. Select one for each aftermarket pump.
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. 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.
- 8AN ORB to 8AN Male Pump-Out Fitting - 6AN ORB to 6AN Male Return Fitting - Collector Box with 1-Way Fill Valve - Venturi Jet Pump Siphon - High Current Electrical Connections - Anodized Fuel Level Sender Mount - Twin Fuel Pump Compatibility - Single Merged Fuel Pump Outlet - Stainless Hardware and Clamps - Alternative Fuel Compatibility