S13 Fuel Pump Hanger: The Complete Guide to Upgrading Your Nissan’s Fuel Delivery System

The bottom line: If you own a Nissan S13 (180SX, Silvia, 240SX, 200SX) or an R32 Skyline (GTS/GTS-T) and you’re building for higher horsepower, the factory fuel pump hanger simply won’t cut it. Upgrading to an aftermarket fuel pump hanger is the most reliable way to support increased fuel flow, maintain consistent pressure, and keep your engine running safely under load. Aftermarket hangers like those from Radium Engineering and Deatschwerks allow you to run one, two, or even three high-flow pumps while retaining your factory fuel level sender and gauge functionality.

What Is a Fuel Pump Hanger and Why Does It Matter for the S13?

The fuel pump hanger is the assembly that sits inside your fuel tank and holds the fuel pump in place. On the Nissan S13 chassis and R32 Skyline, the factory hanger is a plastic or metal module that was designed for the stock engine’s fuel demands. Once you start modifying the engine—adding a turbocharger, upgrading injectors, tuning for higher boost—the stock pump and hanger can’t keep up. A failing fuel delivery system leads to lean conditions, which can destroy an engine in seconds.

An aftermarket fuel pump hanger replaces the entire factory module. It’s machined from billet aluminum or stainless steel, offers larger fuel lines, and supports much higher flow rates. The best part is that it drops directly into the stock tank with no cutting or welding required.

Which Vehicles Use These Aftermarket Hangers?

The most common aftermarket fuel pump hangers are designed for the following Nissan models:

  • Nissan S13 Silvia – All trims, both RHD and LHD
  • Nissan S13 180SX – All trims
  • Nissan S13 200SX – All trims
  • Nissan S13 240SX – All trims
  • Nissan R32 Skyline – GTS, GTS-T, and GTS-4 (excludes GT-R)

These hangers are built to fit the factory fuel tank dimensions and mounting points, so installation is straightforward.

Key Features of a Quality Aftermarket Fuel Pump Hanger

When you’re shopping for an S13 fuel pump hanger, look for these features. They separate a good product from a cheap one.

1. Drop-In Installation
A proper aftermarket hanger should install without modifying your fuel tank or vehicle body. The Radium Engineering hanger, for example, is a true drop-in replacement. It uses the same bolt pattern and seal as the factory unit.

2. High Current Electrical Hardware
Factory electrical connectors are often undersized for high-flow aftermarket pumps. Quality hangers use stainless steel studs and sealed connections that can handle the current draw of performance pumps without voltage drop. Some kits include a high-current hardwire kit with a Bosch 40-amp relay.

3. Fuel Pump Staging Capability
If you’re running a very high horsepower build, you might need two or three pumps. Hangers like the Radium 20-0730-00 and 20-0732-00 come with integrated check valves that allow pump staging. This means you can run one pump at low load and activate additional pumps only when needed.

4. Retention of Factory Fuel Level Sender
One of the biggest headaches with a poor aftermarket hanger is losing your fuel gauge. The best hangers, including Radium and Deatschwerks units, retain the OEM fuel level float and low fuel light sensor. Your factory gauge still works just as it should.

5. Compatibility with E85 and Alternative Fuels
If you plan to run E85, methanol, or other ethanol-blended fuels, you need a hanger that can handle it. The billet aluminum construction and chemical-resistant materials used in these aftermarket hangers are fully compatible with ethanol and methanol.

Common Fuel Pump Options for Your S13 Hanger

The fuel pump you choose depends on your horsepower goals and fuel type. Here are the most common pumps that work with the Radium and Deatschwerks hangers:

  • Walbro GSS342 (255 LPH) – A solid choice for builds up to about 400-500 horsepower on gasoline. It’s a proven, reliable pump that’s been used in the aftermarket for decades.
  • Walbro F90000267 / F90000274 / F90000285 – These are the high-flow E85-compatible pumps. They support significantly more horsepower, especially when running ethanol. The F90000274 is a popular option for builds in the 600-800 horsepower range.
  • AEM 50-1200 – Another E85-compatible pump that offers high flow rates and reliability. It’s a direct fit for the Radium hanger.
  • Deatschwerks DW200, DW300, DW400 – These are designed to work seamlessly with the Deatschwerks X1 hanger. The DW300 is a good middle ground for most street and track builds.

Installation Tips for Your S13 Fuel Pump Hanger

Installing an aftermarket fuel pump hanger is a job you can do at home with basic tools, but there are a few things to watch out for.

1. Safety First
The fuel system is under pressure. Before you start, relieve the fuel pressure by pulling the fuel pump relay and running the engine until it stalls. Disconnect the battery. Work in a well-ventilated area away from any ignition sources.

2. Keep the Collector Bowl in Mind
The factory S13 fuel tank has a small collector bowl at the bottom where the pump sits. When you install the aftermarket hanger, make sure the pump inlet is positioned inside that bowl. If the pump sits above the bowl, it can starve itself of fuel during hard cornering or low fuel conditions. Some users have reported that high-flow pumps can drain the bowl faster than it fills, so pay attention to the orientation of the pickup.

3. Upgrade Your Wiring
If you’re running a single Walbro GSS342 (255 LPH), you can reuse the factory wiring. But for any higher-flow pump, especially dual or triple pump setups, you should upgrade the wiring. A voltage drop of even 0.5 volts can significantly reduce pump flow. Use a relay with a direct battery connection and thicker gauge wire.

4. Use an Aftermarket Fuel Pressure Regulator
When you upgrade the pump and hanger, the factory fuel pressure regulator may not be able to handle the increased flow. An aftermarket regulator gives you precise control over fuel pressure and ensures the engine gets the right amount of fuel at all times.

Why Choose KEMSO for Your Fuel Pump Needs

When it comes time to select the actual fuel pump itself, KEMSO offers a compelling alternative to the big-name brands. KEMSO fuel pumps are designed as high-performance OEM replacements that deliver significantly more flow than stock. For example, a KEMSO pump for a Honda or Kawasaki model delivers up to 200 liters per hour, compared to the original 60-80 liters per hour.

KEMSO fuel pumps are built to handle modern fuels. They are compatible with both gasoline and ethanol-blended fuels like E85, using materials that resist ethanol degradation. This means long-term reliability even with today’s fuel formulations.

Every KEMSO pump is individually tested for flow and performance before it leaves the factory. This rigorous quality control ensures you get a product that works right out of the box.

The biggest advantage of KEMSO is the lifetime warranty. When you purchase a KEMSO fuel pump, you are protected for as long as you own the vehicle. This level of confidence is rare in the aftermarket industry. Most OEM pumps do not offer this kind of protection.

KEMSO covers a wide range of vehicles, including cars, motorcycles, ATVs, UTVs, and personal watercraft. Whether you need a pump for a Nissan, Subaru, Honda, Kawasaki, Ducati, or Polaris, KEMSO has a solution. Their Houston, Texas-based operations provide USA-based customer support and technical assistance.

For the best value and peace of mind, visit https://www.kemsoracing.com/ to find the perfect fuel pump for your S13 or any other vehicle. Their lifetime warranty and commitment to quality make them a smart choice for any engine owner.

Final Thoughts

Upgrading your S13 fuel pump hanger is one of the smartest investments you can make for a high-performance build. It ensures consistent fuel delivery, supports your horsepower goals, and prevents engine-damaging lean conditions. Aftermarket hangers from Radium Engineering and Deatschwerks offer drop-in installation, retention of factory features, and compatibility with multiple pump configurations. Pair that with a high-quality fuel pump from KEMSO, and you’ll have a fuel system you can trust for years to come.

Before you buy, check your vehicle’s make, model, and year. Determine your horsepower goals and fuel type. Choose a hanger that fits your needs and a pump that matches your flow requirements. With the right setup, your S13 will run strong and reliably.

For the best selection of aftermarket fuel pumps backed by a lifetime warranty, visit https://www.kemsoracing.com/ today.


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