Fuel Surge Tanks

Select your vehicle to see Fuel Surge Tanks that fit

Fuel Surge Tanks: keep the pump fed when fuel slams sideways

A fuel surge tank sits between your lift pump and your main high-pressure pump to solve one problem: fuel slosh. Under hard cornering, heavy braking or a low tank, fuel moves away from the pickup and the main pump sucks air, which leans the engine at the worst possible moment. Fuel surge tanks stay full because a lift pump feeds them constantly, so the high-pressure pump inside always has a solid column of fuel to pull from. If you track a car, run big power, or have moved to a fuel cell, this is the part that stops fuel starvation.

You mount it low, plumb the lift pump in, run the high-pressure pump out to the rail, and return the overflow. Done right, the engine never knows the main tank is half empty in a long left-hander.

What we stock

There are 24 fuel surge tanks in stock across three brands. Radium Engineering makes up the bulk of the range at 22 units, with single listings from DeatschWerks and Fuelab. Prices currently run from $351 to $1,802 — that's the live range for what's on the shelf, not a fixed promise. At the top sits the Fuelab High Efficiency 290mm system rated to 1500 HP with a twin screw pump. The DeatschWerks 5.5L modular tank includes three DW400 pumps for high-flow builds.

How to choose

The main decision is whether you want pumps included or not. The Radium FCST-X with two surge pumps and one lift pump included is a complete package — you plumb and wire, no separate pump sourcing. If you already have pumps or want to spec your own, the Radium FCST-X fuel cell tank ships without pumps, which lowers the entry price and gives you control over flow. Capacity and pump count scale with power target: more power wants more volume and more pumps, and that pushes you up the price ladder.

What else you need with it

A surge tank is one piece of the fuel system. You'll likely need fittings and adapters to plumb the inlets, outlets and return, and possibly extra fuel pumps if you buy a tank without them. Browse the wider Engine Components section for supporting parts, and if the build is coming apart on the bench, gasket kits are in the same aisle.

Fitment and ordering

Fitment data is available on 8 of these products, covering vehicles across a 1993–2018 year range including the Nissan Skyline, 240SX and Silvia, Mazda RX7, Honda S2000, Mitsubishi Evo X, Ford Focus ST and RS, and BMW 3 Series. Many surge tanks are universal-mount, so check each listing. Not sure what fits your car? Call our fitment line at 813-535-5801 or reach us through contact us. Every order ships free, and Affirm financing is available at checkout via financing.

Fuel Surge Tanks: keep the pump fed when fuel slams sideways

A fuel surge tank sits between your lift pump and your main high-pressure pump to solve one problem: fuel slosh. Under hard cornering, heavy braking or a low tank, fuel moves away from the pickup and the main pump sucks air, which leans the engine at the worst possible moment. Fuel surge tanks stay full because a lift pump feeds them constantly, so the high-pressure pump inside always has a solid column of fuel to pull from. If you track a car, run big power, or have moved to a fuel cell, this is the part that stops fuel starvation.

You mount it low, plumb the lift pump in, run the high-pressure pump out to the rail, and return the overflow. Done right, the engine never knows the main tank is half empty in a long left-hander.

What we stock

There are 24 fuel surge tanks in stock across three brands. Radium Engineering makes up the bulk of the range at 22 units, with single listings from DeatschWerks and Fuelab. Prices currently run from $351 to $1,802 — that's the live range for what's on the shelf, not a fixed promise. At the top sits the Fuelab High Efficiency 290mm system rated to 1500 HP with a twin screw pump. The DeatschWerks 5.5L modular tank includes three DW400 pumps for high-flow builds.

How to choose

The main decision is whether you want pumps included or not. The Radium FCST-X with two surge pumps and one lift pump included is a complete package — you plumb and wire, no separate pump sourcing. If you already have pumps or want to spec your own, the Radium FCST-X fuel cell tank ships without pumps, which lowers the entry price and gives you control over flow. Capacity and pump count scale with power target: more power wants more volume and more pumps, and that pushes you up the price ladder.

What else you need with it

A surge tank is one piece of the fuel system. You'll likely need fittings and adapters to plumb the inlets, outlets and return, and possibly extra fuel pumps if you buy a tank without them. Browse the wider Engine Components section for supporting parts, and if the build is coming apart on the bench, gasket kits are in the same aisle.

Fitment and ordering

Fitment data is available on 8 of these products, covering vehicles across a 1993–2018 year range including the Nissan Skyline, 240SX and Silvia, Mazda RX7, Honda S2000, Mitsubishi Evo X, Ford Focus ST and RS, and BMW 3 Series. Many surge tanks are universal-mount, so check each listing. Not sure what fits your car? Call our fitment line at 813-535-5801 or reach us through contact us. Every order ships free, and Affirm financing is available at checkout via financing.