What Is the DeatschWerks DW400 Module + Plumbing Kit?

The DeatschWerks 9-401-601-7015 kit is a complete upgraded fuel delivery solution built around the:

• DW400 in-tank fuel pump

The package also includes:

• Upgraded plumbing components
• Installation hardware
• Fuel module integration parts

This system is engineered to provide:

• Higher fuel flow capacity
• Improved fuel delivery stability
• Better ethanol compatibility
• Increased reliability under load

Especially for vehicles pushing significantly more horsepower than factory fuel systems were ever intended to handle.

Which, honestly, describes most modified turbo cars after about six months of ownership.

Deatschwerks – DW400 Module + Plumbing Equipment (nine-401-601-7015)

What Makes the DW400 So Popular?

The DW400 has become one of the most respected high-flow in-tank fuel pumps in the aftermarket because it offers:

• Massive fuel flow capability
• Excellent reliability
• E85 compatibility
• Strong support for high-horsepower builds

The DW400 is capable of flowing approximately:

• 400 liters per hour

That makes it ideal for:

• Turbocharged builds
• Supercharged applications
• Ethanol fuel systems
• High-boost street cars

Basically:
Anything capable of vaporizing rear tires and financial stability simultaneously.

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Why Fuel Delivery Matters More Than Ever

Modern performance builds consume enormous amounts of fuel.

Especially once:

• Boost increases
• Ethanol enters the equation
• Injector sizes climb
• Horsepower targets escalate

A weak or restrictive fuel module can create:

• Pressure drops
• Lean conditions
• Fuel starvation
• Inconsistent fueling
• Engine damage

And lean turbo engines have an incredible ability to transform expensive internals into educational experiences.

E85 Compatibility Is a Huge Advantage

One of the biggest reasons enthusiasts upgrade to the DW400 platform is ethanol compatibility.

E85 has become one of the most popular fuels in performance tuning because it offers:

• Increased knock resistance
• Cooler combustion temperatures
• More aggressive ignition timing potential
• Better boost tolerance

But ethanol also demands significantly more fuel volume than gasoline.

That means:

• Larger pumps
• Better fuel lines
• Stable fuel pressure

The DW400 was designed specifically with these higher fuel demands in mind.

Why the Plumbing Kit Matters

Many enthusiasts focus only on the pump itself while forgetting the surrounding plumbing can become a major restriction point.

The included plumbing kit helps improve:

• Fuel flow efficiency
• Reliability
• Installation quality
• Fuel delivery consistency

This is especially important on:

• Older vehicles
• High-mileage fuel systems
• Modified fuel setups
• Flex fuel applications

Because pushing huge fuel volume through old restrictive plumbing is basically asking your fuel system to breathe through a coffee straw.

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Ideal Applications for the DW400 Module Kit

The DeatschWerks DW400 setup is commonly used on:

• Subaru WRX/STI builds
• Nissan GT-R projects
• Toyota Supra applications
• Mustang turbo setups
• LS turbo builds
• Mitsubishi Evolution builds

Especially combinations targeting:

• 500+ horsepower
• E85 tuning
• Large turbo systems
• High RPM power levels

This is not a “mild bolt-on” upgrade.

This is the kind of fuel system upgrade that usually appears shortly before somebody starts saying:
“I think we can make more boost safely now.”

Dangerous words.

In-Tank Fuel Systems Still Dominate Street Builds

Despite the rise of external racing fuel systems, modern in-tank solutions like the DW400 remain extremely popular because they offer:

• Better drivability
• Lower noise
• Improved fuel cooling
• Easier street use
• Cleaner installation

That makes them ideal for:

• Street/strip hybrids
• Track cars
• High-powered daily drivers

Cars that still need to survive:

• Traffic
• Heat
• Long drives
• Gas station conversations with strangers asking “is it fast?”

Supporting Mods You Should Pair With It

Upgrading to a high-flow fuel system requires supporting components capable of handling increased demand.

Recommended upgrades include:

• Larger injectors
• Adjustable fuel pressure regulator
• Flex fuel sensor
• Ethanol-safe fuel lines
• Proper ECU tuning

Because fuel systems are ecosystems.

One weak component eventually affects everything else.

Usually during full boost.
Usually at the worst possible moment.

Professional Installation Recommended

Fuel system upgrades should always be installed carefully and professionally.

Especially on:

• High-horsepower builds
• Ethanol setups
• Boosted applications

Improper installation can create:

• Fuel leaks
• Pressure inconsistencies
• Dangerous lean conditions
• Electrical problems

And fuel leaks near turbochargers remain one of the automotive industry’s least recommended hobbies.

Why Enthusiasts Trust DeatschWerks

DeatschWerks has become one of the most respected names in aftermarket fueling because they focus heavily on:

• Injector technology
• Fuel pumps
• Ethanol compatibility
• Motorsport durability

Their systems are widely used in:

• Street builds
• Drag racing
• Drift competition
• Roll racing
• Time attack cars

Reliable fuel delivery is one of the most important foundations of reliable horsepower.

Without it, everything else becomes temporary.

Final Thoughts

The DeatschWerks DW400 Module + Plumbing Kit (9-401-601-7015) is an outstanding upgrade for enthusiasts building serious horsepower on modern turbocharged or E85-powered platforms.

With:

• High-flow DW400 fuel pump capability
• Ethanol compatibility
• Improved plumbing
• Reliable fuel delivery

…it’s an ideal solution for:

• Turbo builds
• Flex fuel setups
• High-boost applications
• Street and track performance cars

Because once horsepower goals start climbing, the fuel system must evolve with them.

Otherwise the engine eventually communicates its disappointment through smoke and silence.