DeatschWerks 3.5L Module Surge Tank In-Tank Pump Adapter

Fits 2010–2025 Subaru WRX / STI with 3.5L Surge Tank / 440lph Pump

Part #: 9-441-C102-5004

Overview

The DeatschWerks 3.5L Module Surge Tank In-Tank Pump Adapter is a high-quality upgrade designed for performance enthusiasts seeking reliable fuel delivery in their turbocharged Subaru WRX and STI models. This innovative surge tank adapter integrates seamlessly with your vehicle’s existing fuel system, providing a stable fuel supply during spirited driving, track days, or aggressive street use.

Built for those who demand consistent fuel pressure and flow, this adapter ensures your engine receives the fuel it needs for optimal performance. Whether you're upgrading your fuel system for increased horsepower or improving fuel stability during high-demand conditions, this product is an essential component for your build.

Key Features

The DeatschWerks 3.5L Module Surge Tank In-Tank Pump Adapter offers several advanced features designed to enhance your vehicle’s fuel system:

• Constructed from durable, high-quality materials to withstand the demanding conditions of high-performance driving.
• Designed specifically for 2010–2025 Subaru WRX and STI models equipped with a 3.5L surge tank, ensuring a perfect fit and reliable operation.
• Includes the DW440 Brushless & Controller 440lph pump, providing high flow rates for supporting increased horsepower and fuel demands.
• Integrated pump adapter allows for easy installation within the factory surge tank, reducing the need for extensive modifications.
• Brushless motor technology ensures longer service life, reduced heat, and improved efficiency compared to traditional brushed motors.
• Precise control via the included controller enables tuning for optimal fuel delivery and performance.
• Supports high-performance applications, including forced induction setups, race builds, and high-horsepower street cars.
• Designed to improve fuel stability and reduce the risk of fuel starvation during aggressive driving or cornering.

Construction & Design

This adapter features a robust, corrosion-resistant housing crafted from high-grade materials to ensure durability and longevity. The integration of the DW440 brushless pump within the module allows for efficient, quiet operation with minimal heat generation. The design emphasizes ease of installation, with a compact form factor that fits seamlessly into the factory surge tank space.

The use of advanced manufacturing techniques, including precision machining and TIG welding, guarantees a precise fit and reliable seal. The adapter's design also promotes optimal fuel flow, reducing turbulence and ensuring consistent pressure delivery to your engine under all driving conditions.

Performance & Sound

Equipped with the DW440 brushless pump, this adapter delivers up to 440 liters per hour of fuel flow, supporting high horsepower builds and aggressive tuning. The brushless motor provides a smooth, quiet operation with enhanced efficiency and longevity. Drivers will notice improved throttle response and fuel delivery stability, especially during high-demand scenarios.

While primarily focused on performance and reliability, this upgrade also contributes to a more refined engine bay appearance, with a clean and professional look that complements high-performance setups.

Installation & Fitment

The DeatschWerks 3.5L Module Surge Tank In-Tank Pump Adapter is designed for a straightforward, bolt-in installation within the factory surge tank of compatible Subaru models. No extensive modifications, cutting, or drilling are required. The included components and detailed instructions make the upgrade accessible even for those with moderate mechanical skills.

For optimal results, it is recommended to verify your vehicle’s specific configuration and ensure compatibility before installation. Tuning adjustments may be beneficial to maximize fuel delivery and performance gains.

What's Included

• DeatschWerks DW440 Brushless & Controller 440lph pump
• In-tank pump adapter compatible with 3.5L surge tanks
• All necessary mounting hardware and connectors
• Installation instructions and technical documentation

Ideal For

• Subaru WRX and STI owners upgrading their fuel system for increased horsepower
• Performance enthusiasts seeking reliable fuel delivery during spirited driving or track use
• Builds requiring high-flow fuel pumps with durable, long-lasting components
• Drivers aiming to improve fuel stability and reduce the risk of fuel starvation under demanding conditions

Emissions Note

This product is designed for off-road or racing use only and may not be legal for street use in all jurisdictions. Please verify local regulations before installation.