Why Upgrade the Nissan 370Z Fuel Pump?

Your Nissan 370Z’s stock fuel pump is designed to meet the demands of a factory 332 hp engine. Once you start adding bolt-on mods—cold air intakes, headers, exhaust, or a tune—the stock pump often begins to struggle, especially under high-load conditions. A fuel pump upgrade ensures that your engine receives a consistent, high-volume supply of fuel, preventing lean conditions that can cause detonation and power loss. By increasing fuel delivery, you can safely support 20–30% more horsepower, often for well under £300. This makes a pump swap one of the highest bang-for-buck upgrades available.

In this guide, we cover five proven fuel pump upgrades that fit the Nissan 370Z. Each option offers a solid balance of flow rate, reliability, and affordability. Whether you’re building a naturally aspirated street car or a boosted track monster, there’s a pump here that meets your needs.

Top 5 Fuel Pump Upgrades Under $300

1. DeatschWerks DW200 Fuel Pump

The DeatschWerks DW200 is a drop-in replacement pump that delivers a robust 255 liters per hour (LPH) flow rate. Known for its whisper-quiet operation and long-term reliability, the DW200 is an ideal choice for 370Z owners looking to support up to about 500–550 hp at the crank with proper tuning. It’s fully compatible with both gasoline and E85 fuels, making it a flexible option for those running flex-fuel or high-octane ethanol blends.

Installation is straightforward thanks to plug-and-play connectors that mate directly to the factory wiring harness. No cutting or soldering is required, and the pump fits inside the stock fuel pump hanger without modification. Many tuners consider the DW200 a no-brainer for stage 2 builds that combine intake, exhaust, and a dyno tune.

For more technical specifications, visit the DeatschWerks official product page.

  • Flow Rate: 255 LPH (at 43.5 psi)
  • Fuel Compatibility: Gasoline, E85
  • Installation: Plug-and-play, no modification required
  • Price: Typically under $120
  • Pros: Quiet, reliable, easy install
  • Cons: Not suitable for extreme high-horsepower (600+ hp) builds

2. Walbro 255 LPH Fuel Pump

Walbro is a legendary name in fuel systems, and their 255 LPH pump is one of the most common upgrades in the tuning world. It’s a direct fit for the Nissan 370Z and supplies a steady 255 LPH at 40 psi, making it perfect for both naturally aspirated and low-boost supercharged or turbocharged setups. The Walbro 255 is known for its durability; many enthusiasts report trouble-free operation for 100,000+ miles after installation.

One thing to note: older-style Walbro pumps can be slightly noisier than DeatschWerks units, but recent revisions have improved noise dampening. The pump works well with stock fuel pressure regulators and does not require a rewire for most mild builds. For best results, pair it with a thorough tune and consider upgrading your fuel filter or adding a fuel pressure gauge.

For a detailed installation guide, check out this DIY guide from the 370Z forum.

  • Flow Rate: 255 LPH
  • Fuel Compatibility: Gasoline, E85 (with proper testing)
  • Installation: Drop-in, but may require slight trimming of the rubber isolator
  • Price: Typically $80–$100
  • Pros: Proven reliability, affordable, widely available
  • Cons: Slightly louder than some competitors

3. AEM 50-1000 Fuel Pump

AEM’s 50-1000 model stands out with a flow rate of 340 LPH, making it a strong choice for those who want headroom for future upgrades. While it costs a bit more than the Walbro 255, it’s still well within the $200 budget and offers enough flow to support 600+ hp in many configurations. The pump is compact, which makes the drop-in installation easier than some larger universal pumps.

The AEM 50-1000 is fully submersible and compatible with both gasoline and E85. It features a rugged motor design that resists fuel-related wear, and the inlet filter is integrated into the pump housing to simplify installation. For 370Z owners planning a supercharger or turbo kit, this pump is an excellent middle ground between the entry-level 255 LPH units and the high-flow Bosch 044.

Learn more about the AEM fuel pump’s technical data at AEM Electronics.

  • Flow Rate: 340 LPH
  • Fuel Compatibility: Gasoline, E85
  • Installation: Drop-in with slight modifications to the stock hanger
  • Price: Typically $140–$170
  • Pros: High flow, compact, durable
  • Cons: Installation may require trimming the fuel pump bracket

4. Bosch 044 Fuel Pump

The Bosch 044 is a motorsport-grade external fuel pump that requires a bit more effort to install but offers exceptional flow—400 LPH at 72 psi. This pump is a proven performer in race cars and high-horsepower street builds. For the Nissan 370Z, it’s often used as an external inline pump (in addition to a small in-tank lift pump) to feed massive power levels beyond 700 hp.

However, the Bosch 044 is not a simple drop-in replacement. You will need to either install it externally (with proper fuel lines, a filter, and a surge tank) or modify the stock hanger to accommodate its larger size. Many aftermarket hangers, such as the Radium unit discussed next, are designed to accept the Bosch 044. The pump’s robust construction and long lifespan make it a favorite among serious tuners.

For installation details on converting a 370Z to an external Bosch 044, refer to this Z1 Motorsports technical article.

  • Flow Rate: 400 LPH (at 72 psi)
  • Fuel Compatibility: Gasoline, diesel, E85 (with compatible seals)
  • Installation: Requires external mount or custom hanger; not a direct drop-in
  • Price: Typically $180–$240
  • Pros: Extreme flow, proven reliability in motorsports
  • Cons: Harder to install, may require additional components

5. Radium Engineering Dual Drop-In Fuel Pump Hanger

The Radium Engineering dual drop-in fuel pump hanger is a game-changer for high-performance 370Z builds. Rather than being a single pump, this is a complete assembly that replaces your stock hanger and supports two fuel pumps of your choice (e.g., two Walbro 255s or two AEM 50-1000s). The dual-pump setup effectively doubles your fuel delivery, making it suitable for 800–1000+ hp applications.

The Radium hanger is CNC-machined from 6061 aluminum with a Teflon-coated stainless steel assembly. It includes a surge tank that helps prevent fuel starvation during cornering or low fuel levels. While the cost of the hanger alone is around $400–$500, the ability to run two inexpensive pumps means your total system investment can stay under $600–$700—a bargain for serious power levels. However, the original article list includes this as under $300 if you already have a pump. For most enthusiasts, the hanger itself plus two pumps pushes the total above $300, but it remains one of the most effective upgrades for those seeking big horsepower.

See the full product details at Radium Auto.

  • Configuration: Supports two 255 LPH or 340 LPH pumps (choose your preferred brand)
  • Flow Rate: 510–680 LPH total depending on pumps used
  • Installation: Direct plug-and-play with factory wiring; includes prewired submersible connectors
  • Price: Hanger ~$450; adding two pumps brings total to ~$550–$650
  • Pros: Massive flow capacity, surge prevention, no fuel starvation
  • Cons: Higher upfront cost, more complex install than single pump

Fuel Pump Comparison Chart

Pump / Kit Flow Rate (LPH) E85 Ready Install Difficulty Price (approx.) Max HP Support (est.)
DeatschWerks DW200 255 Yes Easy (drop-in) $100–$120 500–550 hp
Walbro 255 LPH 255 Yes (requires testing) Easy (drop-in) $80–$100 450–500 hp
AEM 50-1000 340 Yes Moderate (trimming required) $140–$170 600–650 hp
Bosch 044 400 Yes (seal upgrade) Hard (external mount) $180–$240 700+ hp
Radium Dual Hanger (with 2x AEM 50-1000) 680 Yes Moderate (drop-in hanger) $550–$650 complete 1000+ hp

Installation Tips for Nissan 370Z Fuel Pump Upgrades

Installing a new fuel pump in your 370Z is a straightforward job for a DIY enthusiast with basic mechanical skills, but there are a few key points to keep in mind to avoid complications.

Safety First

Always relieve fuel system pressure before opening the fuel tank. Disconnect the fuel pump fuse and crank the engine until it stalls. Wear safety glasses and work in a well-ventilated area. Keep a fire extinguisher nearby.

Access the Pump

The fuel pump is located inside the fuel tank under the rear cargo shelf. Remove the carpeted floor panel, then the metal access cover. Disconnect the wiring harness and fuel lines. Carefully remove the locking ring (use a special tool or a hammer and punch) and lift out the fuel pump hanger assembly.

Swapping the Pump

Most drop-in pumps simply unclip from the plastic housing inside the hanger. Take note of the orientation and fuel hose routing. Replace the filter sock and rubber grommet if included in the kit. For external or dual-pump setups, follow the manufacturer’s instructions precisely—especially regarding wiring gauge and fuse rating.

Rewiring Considerations

For pumps drawing higher current (e.g., Bosch 044 or dual pumps), it’s wise to upgrade the wiring and fuel pump relay. Many tuners recommend a dedicated 10-gauge wire from the battery through a relay triggered by the stock fuel pump output. This ensures voltage drop doesn’t limit fuel flow.

Fuel Pump Tuning Considerations

A bigger fuel pump alone doesn’t guarantee more power—you must tune the ECU to take advantage of increased fuel delivery. After installing your new pump, have your 370Z dyno-tuned or re-flashed by a reputable tuner. The stock fuel pressure regulator will usually maintain proper pressure, but for large pumps, an adjustable fuel pressure regulator (AFPR) may be needed to prevent over-pressurization at low speeds.

Also, consider upgrading your fuel injectors if your target horsepower exceeds 450 hp. The stock injectors can become a bottleneck beyond that level. A complete fuel system strategy should include the pump, injectors, fuel pressure regulator, and fuel lines—all matched to your power goals.

Conclusion

Upgrading the fuel pump is one of the most cost-effective ways to unleash additional horsepower from your Nissan 370Z. The five pumps featured here—DeatschWerks DW200, Walbro 255 LPH, AEM 50-1000, Bosch 044, and the Radium Engineering dual hanger kit—all deliver meaningful flow increases without breaking the bank.

For most daily-driven street cars aiming for 450–500 hp, the DeatschWerks DW200 or Walbro 255 provides the ideal balance of simplicity and performance. If you’re planning a forced-induction build targeting over 600 hp, step up to the AEM 50-1000 or consider the Bosch 044 for extreme builds. And for those chasing four-figure horsepower numbers, the Radium dual hanger with two pumps is the proven solution.

Remember to pair your new fuel pump with a proper tune and supporting mods. With the right combination, you can confidently claim a 20–30% horsepower gain—and enjoy a more responsive, reliable 370Z for years to come.