Best Fuel Pumps for the Nissan 240SX – Pick the Right One for Your Power Goals

When it comes to upgrading your Nissan 240SX, a fuel pump might not be the first mod on your list—but it probably should be if you’re planning on making real power. A big fuel pump isn’t always necessary for a lightly modded KA24DE or SR20DET, but if forced induction or E85 is in your future, it’s a critical component.

Upgrading your fuel pump ensures consistent fuel delivery under load, supports tuning, and helps avoid leaning out at wide-open throttle—which can mean the difference between a clean pull and a blown motor.

Here’s a breakdown of six of the best fuel pump options for the Nissan 240SX (S13/S14), who they’re best for, E85 compatibility, and what power levels they support.

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1. DeatschWerks DW200 / DW300 Fuel Pump

Best For: Moderate to high-power builds (250–500hp)
E85 Compatible: ✅ Yes
Flow Rate:

• DW200: 255 LPH
• DW300: 340 LPH

DeatschWerks pumps are plug-and-play with the 240SX and offer great reliability. The DW200 is a solid choice for bolt-on turbo builds or N/A engines making up to around 400hp. If you’re pushing toward the 500hp mark or running E85, the DW300 is the better pick. They’re quiet, well-supported, and made specifically for performance.

👉 Check Price on Amazon (DW200/DW300)

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2. Walbro 255 / Walbro 450 (Hellcat Pump Alternative)

Best For: Builds from 300–700hp
E85 Compatible:

• Walbro 255: ❌ Not ideal (can handle limited E85 with caution)
• Walbro 450 (E85 version): ✅ Yes

Walbro is one of the most popular names in aftermarket fuel systems. The 255 is perfect for mild turbo setups (up to 400hp), but the 450 is a beast—it can support over 700hp and is great for E85 builds. If you want to future-proof your setup, go straight to the Walbro 450 with E85 support.

👉 Check Price on Amazon (Walbro 450)

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3. ISR Performance High-Flow Fuel Pump

Best For: Budget builds and street cars (~250–350hp)
E85 Compatible: ⚠️ Not guaranteed

ISR pumps are a solid choice if you’re building on a budget. They offer decent flow (around 255 LPH) and work great for street-driven 240SXs with bolt-ons or a small turbo setup. However, there’s mixed feedback on E85 compatibility, so they’re not recommended for flex-fuel or ethanol-heavy applications.

👉 Check Price on Amazon (ISR Fuel Pump)

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4. AEM 340LPH E85-Compatible Fuel Pump

Best For: E85 builds and high-power street/track cars (350–600hp)
E85 Compatible: ✅ Yes
Flow Rate: 340 LPH

AEM’s 340LPH fuel pump is a favorite for serious power builds and those running E85. It delivers big fuel volume while maintaining excellent reliability. It also fits inside the stock fuel pump hanger with minimal modification. If you want a high-output, ethanol-ready pump, this is one of the best value options out there.

👉 Check Price on Amazon (AEM 340LPH)

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5. OEM Nissan 240SX Fuel Pump

Best For: Stock or near-stock builds (under 250hp)
E85 Compatible: ❌ No
Flow Rate: Around 90-120 LPH

If you’re running a stock KA24 or just need to replace a tired pump, the OEM unit is fine. It’s quiet and reliable—but not designed to support forced induction or ethanol fuels. Great for daily drivers, bad choice for turbo builds.

👉 Check Price on Amazon (OEM Fuel Pump)

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6. Dodge Hellcat Fuel Pump (Walbro 525)

Best For: High-horsepower and E85 builds (600–900hp)
E85 Compatible: ✅ Yes
Flow Rate: 525 LPH

The Hellcat pump is a serious upgrade that’s becoming popular in the Nissan world. This is basically the Walbro 525, and it supports big power and full E85 setups. It requires some modification to install in the S13/S14, but if you’re planning a 500+hp build with ethanol, it’s one of the most cost-effective solutions.

👉 Check Price on Amazon (Hellcat Pump)

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Which Fuel Pump is Right for Your 240SX?

Pump Name	Max HP (Gas/E85)	E85 Compatible	Notes
OEM	~250	❌ No	Only for stock cars
ISR	~350	⚠️ Not Ideal	Budget-friendly
Walbro 255	~400	⚠️ Limited	Best for basic turbo builds
DW200 / DW300	400–500	✅ Yes	Great plug-and-play options
AEM 340LPH	~600	✅ Yes	Excellent mid-to-high power
Walbro 450 / Hellcat (525)	700–900	✅ Yes	Ideal for big builds on E85

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Final Thoughts

Choosing the right fuel pump for your 240SX comes down to your power goals and fuel type. If you’re just getting started or replacing a failing stock pump, OEM or ISR will do the job. For those stepping into turbo territory or planning on E85, DeatschWerks, AEM, or Walbro 450/Hellcat pumps are the move.

Don’t overdo it for your current setup—but don’t undersize it if more power is in the near future.