Radium FHST Add-On, Late Nissan, Walbro F90000267/274/285 or E5LM, Pumps Not Included

This product is to be used with one of the Radium 20-063X fuel hangers. It is recommended to use a single pump hanger to feed the surge tank. The surge tank can then be equipped with one or two fuel pumps to feed the engine.
The Radium Engineering FHST (fuel hanger surge tank) add-on is the ultimate solution for fuel starvation issues. Due to the saddle-bag style OEM fuel tank and insufficient baffling in late model Nissans, fuel slosh is common when driven aggressively. Unstable pressure resulting in a lean fuel mixture can cause engine damage. A stand-alone surge tank is an excellent device for eliminating fuel starvation issues, but installation can be complex. This add-on is a fully functional fuel surge tank mounted inside the OEM tank.
Simple plug and play connections are all that is required to attach the 2 systems together. The FHST add-on utilizes most of the Radium 20-063X-0X fuel hanger parts. The surge tank can hold 1 or 2 aftermarket pumps including brushless variations. With the addition of the fuel pump in the OEM location, there could be 2-3 pumps inside the gas tank (total). Even with all of the extra fuel pumps, the FHST system is very straight forward and relatively simple to install.
No grinding, bending, or modification of the vehicle is required. Furthermore, the system is compatible with all alternative fuels such as E85.

What keeps the surge tank full?
The surge tank fuel pump(s) are supplied with fuel from 4 different sources:
The high flow (low pressure) fuel pump located in the OEM location.
The fuel returning from the fuel pressure regulator (FPR).
The fuel transfer from the integrated venturi jet pump siphon.
The one-way fill valve on the bottom of the surge tank.

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Product Info

External high current fuel pump wiring is provided for installing one FHST pump (1 relay, 1 fuse, and all associated wiring and hardware). To wire in a second FHST pump, a second fuse and relay are required.
There are 2 different FHST kits available. Each is specific to the fuel pump model to be installed. (20-0700/20-0701).
NOTE: Because the fuel pump supplying the FHST (in the original pump location) will now operate at very low pressure (high flow), the OEM external fuel pump wiring will be sufficient for this "lift" pump.

Simple Integration into Fuel Hanger
Fuel Starvation Protection
Anodized Aluminum Construction
Permits 1 or 2 Surge Pumps
Brushless Fuel Pump Compatibility
High Current Electrical Hardware
Gasoline, Methanol, and Ethanol Compliant
Stainless Steel Hardware and Clamps

Vehicle Fitment:
Nissan S14 200SX/Silvia (All Trims)
Nissan S15 200SX/Silvia (All Trims)
Nissan R33 Skyline (All Trims)
Nissan R34 Skyline (All Trims)

Shipping & Returns

Free Shipping does not apply to some heavy items, for example: Wisefab & BC Racing are included for free shipping, NPC and some PWR are not included.

Shipping times may vary depending on your location, however the majority of packages are received within 3-5 business days of dispatch!

We dispatch 5 days a week, and aim to process all orders within 24hrs*

On weekends and public holidays, orders will be processed next business day.

*order processing may be delayed during sale events or holiday periods.

Payment Methods

We accept all major payment methods including Visa, Mastercard, AMEX & Paypal.

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