Radium BMW E90/E91/E92/E93 FHST-RA Fuel Hanger System

Radium BMW E90/E91/E92/E93 FHST-RA Fuel Hanger System

Application: BMW E90/E91/E92/E93 3 Series with N54 or N55 engine Part Type: In-tank fuel hanger surge tank (FHST-RA), one or two pumps, pumps sold separately Part Number: 20-1970, 20-1972

The Radium Fuel Hanger Surge Tank (FHST) is a drop-in replacement that installs inside the BMW fuel tank opposite the factory pump. The OEM pump fills the surge tank, while one or two high-flow aftermarket pumps inside the surge tank feed the engine – eliminating fuel starvation under hard cornering.

The FHST-RA includes an integrated one-way fill valve and a regulator offering 1:1 fuel pressure adjustment, is gasoline and ethanol (E85) compliant, and requires no permanent modification to the vehicle.

Key Features

• Drop-In OEM Replacement: Installs in the tank opposite the factory pump with no permanent modifications
• Fuel Starvation Protection: OEM pump fills the surge tank; surge pumps feed the engine
• 1 or 2 Surge Pumps: Supports one or two aftermarket pumps
• Integrated Fill Valve: Integrated one-way fill valve
• Regulation: 1:1 fuel pressure adjustment
• Construction: Anodised aluminium surge tank canister and 8AN male outlet fitting, stainless steel hardware, fuel-resistant tubing and wiring
• Fuel Compatibility: Gasoline and ethanol compliant

Available Configurations

• 20-1970: suits Walbro GSS342, AEM 50-1000 or AEM 50-1200 pumps
• 20-1972: suits Walbro F90000267, F90000274 or F90000285 pumps

What's Included

• Surge tank
• Pump installation hardware
• Filter socks
• DIY fuel pump wiring kit (one pump) incl. relay and fuse
• Electrical parts kit for external wiring

Optional Parts

• Radium Fuel Hanger Feed w/Filter- BMW 3 Series E90/E91/E92/E93 05-11 (20-0475-03) – fuel feed kit with high-flow filter (stainless -03 or microglass -05)
• Radium DIY Fuel Pump Hard Wiring Kit (17-0031) – wiring kit for an additional pump
• Radium 20-1000-0606 Low Profile Swivel Banjo Fitting, 6AN ORB to 6AN Male – low-profile 6AN ORB fitting required for the return port when using the FPR block-off kit

Important Notes

• Fuel pumps not included – other similar pumps may fit but are not verified
• The included wiring kit covers one pump – an additional pump requires Radium 17-0031
• Also compatible with the E90/E91/E92/E93 M3 tank, but the M3 brushless pump needs a custom trigger solution not covered by the instructions; the 20-0475 feed kits do not suit the M3 (exhaust clearance)
• Not compatible with 1 Series (E81/E82/E86/E87)
• Optional FPR block-off kit 20-0806 requires an external regulator downstream and is not compatible with early FHST units without a return port
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• BMW E90 3 Series – N54/N55
• BMW E91 3 Series Touring – N54/N55
• BMW E92 3 Series Coupe – N54/N55
• BMW E93 3 Series Convertible – N54/N55

Not sure if this suits your vehicle? Email sales@coore.com.au and our team will confirm fitment.