Radium Engineering Fuel Hanger Surge Tank for Mazda RX-7 FD

Radium Fuel Hanger Surge Tank - Mazda RX-7 FD

Application: Mazda RX-7 FD3S – 1993-1995 US market, 1992-2002 JDM
Part Type: In-tank fuel hanger surge tank – up to 3 surge pumps plus 1 lift pump (pumps not included)
Part Number: 20-0950, 20-0951, 20-0952

The Radium Fuel Hanger Surge Tank is designed for the stock Mazda FD RX-7 fuel tank. It supports up to three high-pressure surge pumps plus one lift pump, with an integrated 1.85 litre surge tank to prevent fuel starvation under high lateral G-forces. It installs without grinding, bending or modifying the boot floor sheet metal.

Low-pressure fuel returning from the regulator is routed back into the surge tank to keep it full, and a second 24-hole deflector reduces air bubbles and foaming – all inside the OEM tank. Three versions are available to suit different pump families.

Key Features

• Drop-In OEM Replacement: Installs in the stock tank without modifying the boot floor
• Multi-Pump: 1-3 surge pumps plus 1 lift pump
• Integrated Surge Tank: 1.85 litre surge tank canister inside the OEM tank
• Return Fill: Regulator return fuel refills the surge tank; 24-hole deflector reduces bubbles and foaming
• Lift Collector: Anodised aluminium lift pump baffle and check ball
• Plumbing: 10AN ORB feed port with low-profile 8AN male fitting, 8AN ORB return port with low-profile 6AN male fitting, 8.5mm barbs for the OEM lines
• High-Current Electrical: Sealed stainless studs with non-conductive acorn nuts, ETFE-insulated in-tank wiring
• Fuel Compatibility: Petrol and ethanol compliant

Available Configurations

• 20-0950: Walbro GSS342 (255 LPH), AEM 50-1200, AEM 50-1230 and AEM 50-1235 (the 50-1230/1235 need one 20-1533 check valve per pump)
• 20-0951: Ti Automotive E5LM – includes fuel pump outlet adapter check valves
• 20-0952: Walbro F90000267, F90000274, F90000285, F90000295 (needs one 20-1534 per pump), Protec 11928 and Fuelab 49614 (need 13-1187), DeatschWerks DW810 (needs 20-1534 and 13-1187)

What's Included

• Fuel pump hanger with integrated surge tank (pre-assembled; installer completes final assembly)
• Hardware to assemble the pumps into the hanger
• Filter socks
• Miscellaneous installation hardware
• Barb fittings to reconnect the OEM feed and return hoses
• Electrical hardware for the pump(s), OEM level sender and OEM temperature sensor
• Fuel pump outlet adapter check valves (20-0951 only)

Optional Parts

• Radium Fuel Hanger Surge Tank Feed w/Filter - Mazda RX-7 FD 92-02 (20-0455-03) – optional 8AN feed kit with subframe-mounted filter and heat exchanger (stainless -03 or microglass -05)
• Radium Engineering Check Valve - 6AN ORB to 8.5mm Barb (20-1533) – check valve for AEM 50-1230/50-1235 pumps (20-0950)
• Radium Engineering Check Valve - 6AN ORB to 10mm Barb (20-1534) – check valve for F90000295 and DW810 pumps (20-0952)
• Radium Engineering Fuel Pump Filter Base Adapter – 12mm Brushless Pumps (13-1187) – base for Protec, Fuelab and DW810 brushless pumps (20-0952)

Important Notes

• Fuel pumps are not included
• A lift pump is required on all installations
• Each kit has wiring and connections for the same pump in both the lift and surge positions – mixing pump types requires additional parts
• Enough components are supplied to run all four pumps, so some parts may be unused depending on your setup
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• Mazda RX-7 FD3S (1993-1995) – US market
• Mazda RX-7 FD3S (1992-2002) – JDM

If you're unsure whether this will fit your vehicle, contact our team of experts via email at hello@iilumolab.com and send through a few photos of the car for us to verify fitment.

Installation

We always recommend professional fitment for guaranteed satisfaction. If you're wanting a hassle-free installation, feel free to contact our friendly team as we offer installation services in-store at our Melbourne workshop. For more details, contact us here.

Note

Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.