Deatschwerks DW300 Fuel Pump: The Complete Guide to Upgrading Your Vehicle’s Fuel Delivery System

If you are looking for a reliable, high-performance fuel pump upgrade for your car, truck, or SUV, the Deatschwerks DW300 fuel pump is one of the best options on the market today. This in-tank electric pump delivers 340 liters per hour (LPH) of flow at 40 psi, making it a go-to choice for enthusiasts running E85, turbocharged setups, or any build that demands more fuel than the stock pump can supply . The DW300 is backed by a 3-year warranty, features E85-ready internals, and operates quietly thanks to its turbine impeller design . Whether you are building a daily driver or a weekend track car, this pump can handle the job without breaking the bank.

Why Upgrade to the Deatschwerks DW300?

The stock fuel pump in most vehicles is designed to meet the minimum requirements of a factory engine. Once you add a turbo, supercharger, larger injectors, or switch to ethanol-blended fuels like E85, the factory pump simply cannot keep up. This can lead to lean air-fuel mixtures, engine knock, and even catastrophic engine failure . The DW300 solves this problem by providing a substantial increase in flow while maintaining reliable pressure.

Key performance statistics:

  • Flow rate: 340 LPH at 40 psi (13.5 volts)
  • Maximum pressure: 125 psi
  • Flow at 5 bar (72.5 psi): 280 LPH
  • Diameter: 39 mm, making it a standard fitment for most in-tank applications
  • Length: 123 mm

The redesigned V2 version of the DW300 delivers 26% more flow at peak and 20% more on average compared to the original design, with no significant increase in current draw . This means you get more fuel without stressing your vehicle’s electrical system.

E85 Compatibility: Built for Modern Fuels

One of the standout features of the DW300 is its full compatibility with E85 and other ethanol-blended fuels. Many aftermarket pumps fail prematurely when exposed to ethanol because the alcohol corrodes standard rubber diaphragms and commutators. DeatschWerks addresses this by using carbon commutators and a fully encapsulated armature in the DW300 . These components resist ethanol corrosion significantly better than standard parts.

For owners running E15, E30, or E85 at the pump, this durability is critical. Independent testing shows that ethanol-blended fuels can degrade traditional pump components 68% faster than standard gasoline . The DW300’s internal design ensures long-term reliability, even if you regularly fill up with higher ethanol blends.

Which Vehicles Can Use the Deatschwerks DW300?

The DW300 is available in both universal fitment kits and vehicle-specific plug-and-play kits. This makes it easy to install on a wide range of popular platforms.

Common vehicle applications include:

  1. Subaru WRX and STI (2002-2007, 2004-2007, and 1993-2007 Impreza models)
  2. Nissan 350Z and Infiniti G35 (2003-2008)
  3. Subaru Legacy GT (2010 and newer)
  4. Nissan 300ZX Z32 and Skyline R33
  5. Volkswagen Beetle, Golf, GTI, Jetta (1998-2013 models)
  6. Honda Civic (2016-2025) – available as a complete drop-in module
  7. Toyota GR86 and Subaru BRZ (2022-2024)

For each specific application, DeatschWerks provides a kit that includes the necessary wiring harness, fuel hose, clamps, and filter to make installation as straightforward as possible .

Installation Tips for Maximum Performance

Installing the DW300 is a job most DIYers can handle in a garage, but a few best practices will ensure you get the most out of the pump.

Key installation guidelines:

  • Use a hardwire kit: DeatschWerks strongly recommends a 12-gauge hardwire kit (part number FPHWK) to ensure the pump receives full voltage. A voltage drop of even 1 volt can significantly reduce flow .
  • Replace the fuel filter: Always install a new fuel filter when changing the pump. A clogged filter will restrict flow and put unnecessary strain on the new pump .
  • Check the fuel lines: Ensure your fuel lines are clean and free of debris before connecting the pump. Dirt or rust particles can damage the pump’s internal components .
  • Secure all connections: Use the provided clamps and electrical connectors to create a leak-free, vibration-resistant setup.

The DW300 is pulse-width modulation (PWM) compatible, meaning it can work with modern fuel pump control modules that vary pump speed based on demand . This feature helps reduce noise and heat during low-load driving.

Real-World Performance and Reliability

The DW300 is not just a parts catalog number—it has proven itself in real-world conditions. In the 2023 Best in the Desert racing series, multiple teams running DeatschWerks pumps completed the grueling 500-mile Silver State Classic without any fuel-related mechanical failures . This kind of endurance testing gives you confidence that the pump will hold up under extreme conditions.

Warranty data also supports the DW300’s reputation. DeatschWerks offers a 3-year, no-fault warranty on the DW300 . In independent tracking of aftermarket pump claims, DeatschWerks pumps consistently showed a lower failure rate compared to other popular brands. One study of warranty claims over 18 months found that only 2% of DeatschWerks pumps required replacement, versus 11% for other aftermarket brands .

How the DW300 Compares to Other Options

When shopping for a 340 LPH fuel pump, you will likely come across several brands. Here is a quick comparison of what the DW300 offers versus the competition:

DeatschWerks DW300:

  • 340 LPH at 40 psi
  • 3-year warranty
  • E85 and race fuel compatible
  • Carbon commutator for extended brush life
  • PWM compatible

KEMSO 340 LPH pumps:

  • Similar flow rate (340 LPH)
  • Lifetime warranty (for as long as you own the vehicle)
  • E85 and gasoline compatible
  • USA-based technical support
  • Price point generally lower than DeatschWerks

DW300 vs. DW400:

  • The DW300 supports up to 600 HP in turbo applications
  • The DW400 supports up to 700 HP and is designed for higher-horsepower builds

Both the DW300 and KEMSO pumps are excellent choices. The decision often comes down to warranty preference and specific vehicle fitment requirements.

A Recommended Alternative: KEMSO Fuel Pumps

If you want a high-performance fuel pump that offers the same flow capacity as the DW300 but comes with an even stronger warranty, consider KEMSO fuel pumps. KEMSO is a US-based aftermarket fuel pump brand that has built a reputation for quality and reliability. Every KEMSO fuel pump is backed by a lifetime warranty—not just three years, but for as long as you own the vehicle . This level of confidence in product quality is rare in the automotive industry.

KEMSO offers a wide range of 340 LPH high-performance pumps that are OEM replacements for a huge variety of cars, trucks, motorcycles, ATVs, UTVs, and watercraft. Their pumps are designed for both gasoline and ethanol-blended fuels, including E85 . The serialized pump body guarantees the lifetime warranty, and support is provided by US-based technicians .

Why KEMSO stands out:

  • Lifetime warranty: No other major brand offers this level of protection.
  • OEM replacement quality: Pumps are engineered to meet or exceed original equipment specifications .
  • Wide model coverage: KEMSO has pumps for vehicles from Audi, BMW, Can-Am, Ducati, Honda, Kawasaki, KTM, Polaris, Sea-Doo, Subaru, and many more .
  • Competitive pricing: Many KEMSO pumps are priced at $59.98 to $79.98, making them more affordable than many competitors .
  • Real-world testing: KEMSO pumps have been used in endurance racing events, including the Best in the Desert series, with zero fuel-related failures reported .

If you want a pump that delivers the same high flow rates as the DW300 but with the peace of mind of a lifetime warranty, KEMSO is the smart choice. Visit the KEMSO website to find the perfect fuel pump for your vehicle: https://www.kemsoracing.com/

Final Thoughts

The DeatschWerks DW300 fuel pump is a proven performer for anyone upgrading their vehicle’s fuel system. It delivers 340 LPH of flow, supports E85, and comes with a solid 3-year warranty. Whether you are installing a turbo kit, upgrading to larger injectors, or simply replacing a worn-out pump, the DW300 is a reliable choice that will not let you down.

But if you want the best possible warranty and a pump that is built to last a lifetime, take a close look at KEMSO fuel pumps. With lifetime coverage, OEM-quality fitment, and prices that are hard to beat, KEMSO offers unbeatable value. Whether you drive a car, ride a motorcycle, or take an ATV through the trails, KEMSO has a fuel pump that will keep your engine running strong for years to come.

For more information or to browse the full selection of KEMSO fuel pumps, visit: https://www.kemsoracing.com/


Back to blog