Walbro 400lph 39/50 DC/SS Pump/Kit Package Walbro WAL TIA400-2
Click to zoom in

Walbro 400lph 39/50 DC/SS Pump/Kit Package

Walbro
WAL TIA400-2
TIA400-2
Fuel Pumps
1 Units In Stock - Ships Next Business Day
$ 197.99
$ 197.99

SKU: TIA400-2

Walbro 400lph 39/50 DC/SS Pump/Kit Package for 2002-2014 Subaru WRX STI

The Walbro 400lph 39/50 DC/SS Pump/Kit Package delivers high-flow fuel for 2002-2014 Subaru Impreza WRX STI and select models with turbocharged 2.0L or 2.5L engines. This in-tank assembly supports larger turbos injectors and boost levels up to 600+ wheel horsepower with 400LPH free flow and 312LPH at 43 PSI. Direct installation into the factory saddle tank ensures reliable performance for street and track use.

Key Features

  • 400 LPH Flow Rate: Supplies 400 liters per hour free flow with 312 LPH at 43 PSI to power engines exceeding 600 wheel horsepower
  • Dual Circuit Design: Works with return-style and returnless fuel systems for compatibility across modified Subaru setups
  • Stainless Steel Internals: Resists corrosion from E85 race gas and ethanol blends for long-term durability
  • Complete Installation Kit: Contains pump pre-filter sock wiring harness O-rings hose clamps and hardware for straightforward plug-and-play assembly
  • Quiet Efficient Operation: Turbine impeller provides steady pressure under load with minimal noise

Product Notes

  • Pair with adjustable fuel pressure regulator for precise boost and power management
  • Inspect tank for debris during install to promote extended pump life
  • Packaged to arrive damage-free with all components intact

Installation Notes

  • Professional installation recommended.
  • Relieve system pressure and drop fuel tank to access pump assembly
  • Compatible with OEM wiring connector and mounting bracket

This Part Fits

Year Make Model Submodel
2002-2005 Subaru Impreza WRX Base/Sedan/Wagon 2.0L Turbo
2006-2007 Subaru Impreza WRX Limited/TR/Sedan/Wagon 2.5L Turbo
2004-2007 Subaru Impreza STI Hatchback/Sedan 2.5L Turbo
2008-2014 Subaru Impreza STI Hatchback/Sedan 2.5L Turbo
2005-2009 Subaru Legacy GT 2.5L Turbo

Why Choose Walbro?

  • Backed by decades of fuel system expertise in OEM and aftermarket
  • Used in professional racing teams for reliable high-demand performance
  • Precision-engineered turbine technology for consistent fuel delivery

Frequently Asked Questions

  • Q: Does this pump fit 2006 STI models?
    A: Yes it drops directly into 2004-2014 STI factory tank with matching OEM hanger assembly
  • Q: Can it handle E85 fuel?
    A: Yes stainless steel components and materials are fully compatible with E85 and methanol blends
  • Q: What supporting mods are needed?
    A: Works best with larger injectors adjustable FPR and tune. Supports stock systems up to moderate boost

Shipping & Handling

  • Method: UPS Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Compact box measures 10 x 6 x 6 inches
  • Weight: 2.2 lbs

Request For Information

Have questions about ? Fill out the form below and we'll get back to you by the next business day.
Engine

Engine

This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...

View Engine Products
Fuel Delivery

Fuel Delivery

A properly designed fuel delivery system is the backbone of any high-performance engine build, ensuring the injectors or carburetor receive a consistent supply of fuel at the correct pressure regardless of engine load, RPM, or fuel demand. From factory replacement pumps keeping daily drivers on the road to high-flow in-tank modules supporting 1000-horsepower builds, the right fuel delivery components prevent lean conditions, injector damage, and fuel starvation at the worst possible moment. Modern EFI systems are particularly sensitive to fuel pressure variation, with even small drops causing misfires and power loss under hard acceleration. Whether you are restoring a factory system or engineering a purpose-built race setup, matching pump flow rate and fuel pressure regulation to your injector and engine requirements is essential. Popular Upgrades Top-selling fuel delivery components include Aeromotive Phantom in-tank fuel pump kits that retrofit into factory tanks without custom fa...

View Fuel Delivery Products
Fuel Pumps

Fuel Pumps

A fuel pump is the foundation of every fuel system, and matching pump flow capacity to your engine's actual demand is one of the most critical decisions in any EFI or performance build. Undersized pumps cause lean conditions under hard acceleration that damage pistons and injectors, while oversized pumps can pressurize the fuel system beyond regulator capacity and require additional return plumbing to handle excess flow. Modern in-tank brushless pump designs from Walbro, TI Automotive, and Aeromotive deliver high flow rates with lower current draw and longer service life compared to older brush-style commutator designs. Diesel lift pumps serve a different function, providing pressurized supply to the high-pressure injection pump while also filtering water and particulates, and selecting the right lift pump for your diesel platform directly affects injection system longevity. Popular Upgrades Top-selling fuel pumps include the Walbro 255 LPH and 450 LPH in-tank pumps for popular turb...

View Fuel Pumps Products
Walbro

Walbro

Walbro is a global market leader in engine management and fuel systems, catering to various industries including: Outdoor Power Equipment Recreational Marine Personal Transportation In addition to its core offerings, Walbro is a top supplier of high-pressure aluminum die casting across multiple sectors. Get your Walbo solotions today at Black Ops Auto Works! Products Offered Walbro manufactures a comprehensive range of high-quality products, including: Carburetors Electronic Fuel Injection Systems Ignition Systems Fuel Tanks Fuel Pumps Valves Fuel Storage and Distribution Systems Additionally, Walbro provides value-added services to enhance product efficiency: Machining Electronics Assembly Capabilities Global Presence Headquartered in Tucson, Arizona, Walbro employs over 2,300 professionals worldwide. The company boasts ISO certified manufacturing and engineering facilities located in: The United States Japan Mexico Thailand China Discover the quality and reliability...

View Walbro Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×