2003 Subaru Impreza WRX 2.0
FREE SHIPPING
On orders over $100
TALK TO A PARTS EXPERT
RALLYSPORT GUARANTEE
100% Money Back on Select Parts
Product images
Product Media
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph (Part Number: )
Community Media
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph (Part Number: )
Walbro Fuel Pump Kit 255lph
Subaru WRX/STi 2002-2007
Read 24 Reviews | 32 Q&As
Part # GSS342 400-791
$112.98
msrp: $205.43

In stock! Ships same day
Fits your
2003 Subaru Impreza WRX

Features & Product Details

RallySport Direct carries a great selection of Walbro fuel pumps and fuel pump accessories for those of you who need to supplement those modifications with a proper amount of fuel flow. 

Here, you are looking at the Walbro 255 LPH In-Tank Fuel Pump. The 255 LPH has been widely recognized as the gold standard in the aftermarket fuel pump industry for more than 20 years. These are compatible with a wide range of vehicles and feature unsurpassed quality, durability, and performance. 

 

DETAILS:

  • Wide range of OEM inlet adapters
  • Low amp draw
  • Wide range of high-efficiency, high-performance automotive makes
  • Capable of handling 500 HP under standard operating conditions
  • Flow rate of 255 LPH
  • Includes vehicle specific installation kit
  •  

    Specifications

    Brand: Walbro
    Adjustable: No
    Fuel Flow: 255lph
    Install Kit Included: Yes
    Mfgr. Warranty: No Warranty
    Condition: New Product
    Return Policy:

    RallySport Guarantee - 30 Days


    Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

    The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
    Standard

    PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED

    REVIEWS & CUSTOMER MEDIA

    24 Reviews
    4.5 out of 5 Stars
    5 Stars
    (19)
    4 Stars
    (2)
    3 Stars
    (1)
    2 Stars
    (1)
    1 Stars
    (1)
    Customer Photos and Videos
    Walbro Fuel Pump Kit 255lph ( Part Number: GSS342 400-791)
    Walbro Fuel Pump Kit 255lph ( Part Number: GSS342 400-791)
    Walbro Fuel Pump Kit 255lph ( Part Number: GSS342 400-791)
    Perfect upgrade 3 months ago
    5out of 5stars

    Bought this as I had moved from stock wrx blue injectors to sti pinks but went the vf48 route so I bumped up to 750cc injectors. Kit is completely plug and play, every part was used in the process making the switch an hour job with clean up. Compared to the stock pump, the only real difference is when priming the fuel lines. The Walbro is at least twice as loud but only for the span of maybe 2 or 3 seconds. Holds pressure great and so far am very pleased with the results.
      
    Was this review helpful?
    Works good 4 months ago
    5out of 5stars

    I’ve been running this walbro pump for atleast 6 months now. Still works great. There’s been like 2 times I can recall that i heard it running abnormally loud for about 30 seconds while the car was on. It was the middle of summer 90°+. I don’t know if that maybe had something to do with it. Otherwise no issues.
      
    Was this review helpful?
    4.5 Stars , 05 WRX  7 months ago
    5out of 5stars

    Tight fit since the walbro was too long by about 1cm. That requires bending the bottom of the bracket down which is not pleasing but it worked. You can see what I mean in the picture. Also the clamps in the kit are not fuel line clamps. Besides those issues the install was a breeze. The pump is notably louder on start-up, but even on my very quiet car it’s pleasant and not heard from after that. It did require tuning since I had been at the limits of the stock pump. The new one put me a little rich at the top end but I would say a tune is not usually necessary.
      
    Was this review helpful?
    Walbro 255 11 months ago
    5out of 5stars

    I had to change the fuel filter on my '04 STi and I figured I might as well upgrade my fuel pump while I'm in there... This kit comes with everything I needed. Direct fit. Easy to do.
      
    Was this review helpful?
    Awesome  1 year ago
    5out of 5stars

    Just got this because my old pump was failing and was causing a lean condition. It's like everyone says it's loud but you know its working. My cars stock and this is Definitely worth the upgrade, doesn't bog or hesitate at full boost. it takes around an hour to do yourself. Just be careful with the level arm putting it back in. Your gonna need the upgrade eventually just get it
      
    Was this review helpful?

    QUESTIONS & ANSWERS

    • Q: Horsepower   Seaneg113 months ago

      What is the maximum horsepower I could hit with this pump?
    • Q: walbro fuel pump/ 16 sti  kouness6 months ago

      What is required to install the walbro 255 fuel pump into a 16 Sti? Is it a drop in or requires modification? thanks
    • Q: Post-Instal  WRXItalia7 months ago

      '06 STi was running lean and hesitating/boost leak was present. Bought the 255 thinking it was the pump. After the install the CEL was gone and it idles a lot better but the car has a bad boost leak and hesitates and bogs on full boost. After letting off the throttle at any speed the car lurches as well. Is this still the fuel pump issue?
      • 2 of 2 people found the following answer helpful

        A:  A boost leak cannot be related to a fuel pump as fuel does not run in any part of where the boost is flowing. You are going to need to have a mechanic diagnose your car.

        Devan M. @ RallySport Direct 7 months ago  
          
        Was this answer helpful?
    • Q: Fule pump   Mv1251212 months ago

      Can I run e85 with this fule pump
      • 0 of 0 people found the following answer helpful

        A:  This fuel pump is E85 compatible, although you may want to go for a higher LPH pump, depending on your power goals.

        Marcus E. @ RallySport Direct 12 months ago  
          
        Was this answer helpful?