SKU: 31121640976

FST-R, TI AUTOMOTIVE E5LM, PUMP NOT INCLUDED

Sale price$199.32 Regular price$221.47
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Description

FST-R, TI AUTOMOTIVE E5LM, PUMP NOT INCLUDEDRADIUM DOES NOT OFFER A WARRANTY ON ANY FUEL PUMPS! FUEL PUMPS CAN BE RETURNED IN UNUSED CONDITION WITHIN 30 DAYS OF PURCHASE. SEE TERMS AND CONDITIONS FOR MORE INFORMATION. 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

RADIUM DOES NOT OFFER A WARRANTY ON ANY FUEL PUMPS! FUEL PUMPS CAN BE RETURNED IN UNUSED CONDITION WITHIN 30 DAYS OF PURCHASE. SEE TERMS AND CONDITIONS FOR MORE INFORMATION.

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, 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.

Need help selecting a fuel pump configuration for your vehicle?

RADIUM FST-R FEATURES
-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
-Three 6AN male fittings

RADIUM FST-R
The FST-R (Fuel Surge Tank–Regulated) is an all new design that houses a single internal fuel pump and has an integrated fuel pressure regulator machined into the top cap. The high-flow regulator is adjustable and features interchangeable orifice sizes. This revolutionary idea eliminates the need for an external fuel pressure regulator along with the extra fittings and hoses. This simplifies the installation, reduces overall cost, reduces weight, and eliminates potential leak points in the fuel system. Furthermore, this system permits cooler fuel temperatures as the fuel is not returning from the hot engine bay. Like all Radium fuel surge tanks, this universal product can be used on any fuel injected application and is compatible with all fuel types. Additional details on the design of the FST-R can be found here.

The FST-R can be configured with all 39mm fuel pumps from many leading manufacturers. Note: The FST-R is not available in dual-pump configurations. If the pump is purchased as part of the FST-R, the surge tank will come fully assembled and will be pressure tested for leaks and ready to be installed. If the pump is purchased elsewhere, some assembly will be required.

Please see the MORE DETAILS tab on this page (above) for additional info on plumbing a FST-R.

The side port is the regulated pressure output and is plumbed directly to the fuel rail(s). No additional fuel pressure regulator is required. Pressure adjustment is done using the adjustment screw located on the top cap of the regulator unit. A vacuum line hooks up to the nipple on the FST-R to achieve 1:1 vacuum reference. Note: returnless fuel systems commonly use a constant fuel pressure. In this case, the vacuum reference hose is not required.

The FST-R is no taller than a standard fuel surge tank with hoses installed.

Two interchangeable orifices are included with calculated flow diameters to match the fuel pump flow to the regulator. Furthermore, this added precision will resist diaphragm flutter and optimize pressure stability.


A fuel pressure gauge is needed in order to set and monitor fuel pressure and should be located along on the output line or at the fuel rail. The Radium universal fuel pressure gauge is perfect for this duty. Shown above is the gauge with the optional in-line Tee fitting.

For the 20-0368-00 Ti Automotive E5LM FST-R, a 20-0598 check valve is included to prevent backflow, as shown above.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 31121640976

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4.3 ★★★★★
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Jeremy Spencer
Birmingham, US
★★★★★ 2
Flimsy
Size: Full, Color: Walnut
Design which reduces size of box it's needed to ship in results in a frame that doesn't feel durable in the slightest. Sub par compared to other frames at similar price point.
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Reviewed in the United States on May 29, 2026
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Christian
Draper, US
★★★★★ 5
High quality product
Size: Twin, Color: White
High quality!! It was exactly what I was looking for.
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Reviewed in the United States on June 3, 2026
A
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Amazon Customer
Massapequa, US
★★★★★ 1
Broke nearly immediately
Size: Queen, Color: Walnut, Size: Queen, Color: Walnut
Terrible. Broke after a month or so of normal use. DO NOT BUY
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Reviewed in the United States on April 12, 2026
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Vile
Battle Creek, US
★★★★★ 5
Outstanding affordable bed frame
Size: Twin, Style: Kai, Size: Twin, Style: Kai
Outstanding bed! Just the right size. Sturdy! Easy to assemble and looks great, too. I had some issues like other reviewers. Mattress slid so I put a layer of foam down between the frame and mattress. All good now! The frame’s too low to the floor for me so I added a thick foam topper so I’m higher up. No issues with slats falling out or anything getting loose over time. I had some difficulty assembling the frame as described but that’s a “me” problem. Got everything correct after a couple tries. The multiple attempts caused no damage. The wood slats took some rough handling during assembly due to them fitting in tight. Assembled fine as a single person with no help. Highly recommend! Especially for the price.
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Reviewed in the United States on July 22, 2025
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Grantham, US
★★★★★ 5
Another great bed frame from Zinus
Size: Queen, Style: Leah
This is the 3rd or 4th or so Zinus bed frame I've purchased and just like the rest, the assembly is easy to follow, it's sturdy, and it looks great. They're also easy to break down and re-assemble in case of a move. The way they use Velcro for the slats to stick to the frame that otherwise ALWAYS fall at some point on other bed frames and is a pain to fix, makes it so much better. They also have a sticky thing on the slats to stick the mattress to the bed frame so the mattress doesn't slide around but I never need to use it. I assembled the bed frame by myself and it took less than an hour. I love that they include a little ratchet in the hardware. All the screws screwed in easily to all the places they needed to go. It's not too heavy. I have a 12 inch mattress so it does almost completely cover the bottom slat on the headboard. The pillows on my 12 inch mattress pretty much cover the headboard. They must use a really thin mattress for the product picture because my bedding engulfs 99% of the frame and you can barely see it, so be warned if you want the bed frame to be visible but have a high mattress/fluffy bedding. I got this one because I had a really low profile frame from them before and I wanted to utilize under bed storage. This has plenty of room to put things away underneath. Either way I really enjoy Zinus's products and will continue to purchase them in the future.
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