What Is the DeatschWerks 9-401-608-7040 Kit?

The DeatschWerks 9-401-608-7040 package is a complete high-performance fuel system solution designed for:

• Honda Civic EP3/EM2/ES chassis
• Acura RSX DC5 applications
• Turbocharged Honda builds
• E85 and flex fuel setups

The kit includes:

• DW400 in-tank fuel pump module
• Return fuel system conversion
• Stainless steel PTFE fuel plumbing
• Supporting installation hardware

This setup is engineered for enthusiasts building:

• High-horsepower K-series swaps
• Turbo RSX builds
• E85 Hondas
• Competitive drag or track cars

Basically:
Cars that left “basic bolt-ons” behind a very long time ago.

Deatschwerks – DW400 Pump Module + Go back Equipment SS PTFE for 2001-05 Honda Civic 2002-06 Acura RSX (nine-401-608-7040)

Why the DW400 Fuel Pump Matters

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

• Massive fuel volume
• Excellent reliability
• Ethanol compatibility
• High-horsepower support

The DW400 is capable of supporting serious fuel demand under:

• High boost
• Large injectors
• E85 fueling
• High RPM operation

Which matters because K-series engines absolutely love boost.

And Honda owners absolutely love turning the boost up irresponsibly.

DW400 Pump Module + Go back Equipment SS PTFE for seventh Gen 2001-05 Honda Civic and 2002-06 Acura RSX
Gasoline Pumps

Why Convert to a Return Fuel System?

Many older Hondas and RSXs use returnless-style fuel systems from the factory.

That works fine for:

• Stock power
• Mild bolt-ons
• Conservative tuning

But once power goals increase, return-style systems offer major advantages:

• More stable fuel pressure
• Better fuel temperature control
• Improved tuning consistency
• Higher fuel flow capability

Especially on:

• Turbocharged applications
• E85 builds
• Big injector setups

Because unstable fuel pressure under boost is how engines begin expensive conversations.

Why PTFE Stainless Fuel Lines Matter

The included stainless steel PTFE fuel lines are one of the biggest upgrades in this kit.

PTFE lines offer:

• Excellent ethanol resistance
• Improved durability
• Reduced fuel odor
• Better long-term reliability

This is especially important because E85 can degrade standard rubber fuel lines over time.

And leaking ethanol near hot turbo components is one of the least recommended experiences in motorsports.

Perfect for K-Series Turbo Builds

The 2001–2005 Civic and 2002–2006 RSX platforms became legendary because of:

• Lightweight chassis design
• Massive aftermarket support
• K-series swap potential
• Incredible turbo performance

Modern K-series turbo builds routinely make:

• 500 horsepower
• 700 horsepower
• Four-digit drag setups

Which means the fuel system must evolve accordingly.

Otherwise the engine eventually expresses disappointment through connecting rods.

Ideal Applications for the 9-401-608-7040 Kit

This DeatschWerks system is ideal for:

• Turbo RSX builds
• K-swapped Civics
• E85 street cars
• Drag Hondas
• Roll racing builds
• High-horsepower street setups

Especially combinations running:

• Large injectors
• Big turbo systems
• Flex fuel tuning
• Aggressive boost curves

This is not a cosmetic modification pretending to be performance.

This is actual race-grade fueling hardware.

Supporting Mods You Should Pair With It

A complete fuel system upgrade works best alongside:

• Large injectors
• Flex fuel sensors
• Standalone ECU tuning
• Ethanol-compatible regulators
• Upgraded fuel rails

Because every part of the fuel system must work together.

One weak point eventually limits everything else.

Usually right when VTEC and boost arrive simultaneously.
Which is spiritually violent enough already.

Professional Installation Strongly Recommended

This is a serious fuel system conversion kit.

Professional installation is highly recommended for:

• Fuel line routing
• Pressure regulation
• ECU calibration
• Return system integration

Especially on:

• E85 builds
• Turbocharged setups
• High-horsepower street cars

Because fuel system mistakes under boost become dangerous surprisingly quickly.

Why Enthusiasts Trust DeatschWerks

DeatschWerks has earned a strong reputation because they focus heavily on:

• High-flow fuel systems
• Ethanol compatibility
• Motorsport durability
• Modern EFI support

Their products are trusted across:

• Drag racing
• Street performance
• Drift competition
• Time attack
• Roll racing

Reliable fueling remains one of the most important foundations of reliable horsepower.

Not giant dyno numbers.
Not two-step flames.
Fuel.

Vehicle Fitment

The DeatschWerks 9-401-608-7040 kit fits:

Honda

• 2001–2005 Honda Civic

Acura

• 2002–2006 Acura RSX

This kit is especially popular for:

• EP3 Civic Si builds
• DC5 RSX Type-S projects
• K-swapped Hondas
• Turbocharged street and drag applications

Final Thoughts

The DeatschWerks DW400 Pump Module + Return Kit SS PTFE (9-401-608-7040) is one of the best fueling upgrades available for serious Honda and Acura performance builds.

With:

• DW400 high-flow fuel pump capability
• Return-style fuel delivery
• PTFE stainless fuel plumbing
• E85 compatibility

…it’s an ideal solution for:

• Turbo K-series builds
• Flex fuel Hondas
• High-horsepower RSXs
• Competitive street and track cars

Because once your Honda build starts making real power, the fuel system stops being optional and becomes life support.

And boosted K-series engines have absolutely no patience for weak fuel delivery.