Radium Engineering FST-R Fuel Surge Tank with Integrated FPR (Walbro F90000267 E85, Pump Included) – Universal

In Stock (2)


Radium Engineering Walbro F90000274 E85 FST-R (Pump Incl)


A fuel surge tank (FST) is designed to prevent fuel starvation to the engine on vehicles with inadequate fuel tank baffling. The FST fuel pump feeds the fuel rail(s). The volume of fuel inside the surge tank acts as a buffer to always keep the FST pump supplied with fuel. This volume is maintained by the main fuel tank’s (lift) pump as well as the fuel returning from the fuel pressure regulator.

In the case of the FST-R (patent pending), the regulator is built in to the surge tank and is recirculating fuel internally. Excess fuel in the surge tank is returned back to the vehicle’s main fuel tank.

Installing a surge tank is also an easy way to upgrade the fuel pump of a vehicle without opening or modifying the OEM fuel tank.


Full CNC aluminum construction with O-ring sealed interfaces

Anodized for compatibility with all fuel types

Integrated adjustable fuel pressure regulator with 1:1 vacuum reference

Interchangeable regulator orifice sizes to match output of different pumps

Nickel-Plated Electrical Connector with 24″ Flying Leads

Assembled with stainless steel hardware

6AN male hose connections

Fully assembled and leak tested before shipment

Lifetime warranty on Radium components (excludes fuel pump, hoses and fittings)

SKU: 20-0135-01

Vendor: Radium Engineering

Additional information

SKU 20-0135-01
Carb Compliance Yes
Prop 65 Unknown
EPA Approved N/A
Weight 4.6 lbs
Dimensions 13.2 × 6.8 × 6.4 in