Buy Now, Pay Later!
On orders over $200
100% Money Back on Select Parts
Product images
Product Media
Walbro Installation Kit (Part Number: )
Walbro Installation Kit (Part Number: )
Walbro Installation Kit (Part Number: )
Walbro Installation Kit (Part Number: )
Walbro Installation Kit (Part Number: )
Walbro Installation Kit (Part Number: )
Community Media
Walbro Installation Kit (Part Number: )
Walbro Installation Kit
Subaru WRX/STi 2002-2007
Read 13 Reviews | 5 Q&As
Part # 400-791
msrp: $39.86

In stock! Ships same day

Features & Product Details

The Walbro Subaru installation kit includes 2 hose clams, new fuel hose, new fuel filter, new rubber stop, and a new wiring pigtail(plug and play). This makes installation of the Walbro GSS342 fuel pump simple and straightforward with all the required components needed for the fuel pump. 


Brand: Walbro
QTY: 1
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.



13 Reviews
4.2 out of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Customer Photos and Videos
Walbro Installation Kit ( Part Number: 400-791)
Pump sock does not fit. Reuse the OEM one.  2 years ago
"Makes installation of the Walbro GSS342 into the Subaru WRX and STI very quick and easy." This is not the case. The Walbro pump sock does not fit the STi slosh box and I found that out after pressing the retaining washer on the delicate plastic post of the Walbro pump whereas the OEM pump is metal. You would have to hack the slosh box apart to the point of it not being worth using anymore in order to get the supplied pump sock to fit correctly. Getting the retention washer back off in order to use the OEM pump sock scraped a bunch of material off the plastic post so I ended up reusing OEM star shaped retention washer since it grabbed the now shaved post better. Removing the OEM star shaped retention washer requires bending the the little fingers up with a jewelers screwdriver so I flattened the washer in a vise before reinstalling it. I found no mention of the fitment issue until I went on the NASIOC forums to find out why the Walbro sock didn't fit and also found people complaining of the Walbro sock collapsing under low fuel conditions whereas the OEM sock had plastic reinforcement bars. This would have been good information to know before creating the extra work and dumpster diving for the OEM stuff I wasn't aware that I needed.
Was this review helpful?
Good stuff 4 years ago
Good stuff fits just right
Was this review helpful?
worked as advertised, but didn't need all the parts 4 years ago
Used for a fuel filter/pump change on a 2007 WRX. Didn't need the electrical connector, and didn't need the fuel hose and clamps, but used the hose and clamps anyway. Rubber isolator fit well on the Walbro. Filter sock was fine as well. I would recommend RSD add the little friction-fit filter sock lock washer to the kit. I nearly lost mine during the removal process, and would have set back my installation a bit while I ran to the parts store. Otherwise, not a bad kit, and provides some insurance to get the job done at one time with the right parts.
Was this review helpful?
Its ok 5 years ago
Didn't really need much from this kit just the washer and clamps but all in all good kit
Was this review helpful?
not that great if your on a budget. 5 years ago
2 wings
the only part I absolutely needed from this kit was the tiny washer that holds the pre fuel filter to the fuel pump. I also used the new rubber stop just to use it but could have re used the oem one. I paid 30 bucks for a tiny lock washer. I still gave this 3 stars because you dont know what your going to have until you pull out the fuel pump assembly but my car has 108k miles on it and everything was in great shape.
Was this review helpful?


  • Q: fuel filter  Pdad3 years ago

    im planning to change my stock fuel pump, do i need to change to the fuel filter as well the one above the pump and are you selling that too beside the filter sock?
  • Q: 2008 Subaru STi  smjfifa020094 years ago

    Hi would this installation kit fit 2008 sti? If not which one does?
    • 0 of 0 people found the following answer helpful

      A:  This kit would not work for your car. Unfortunately we do not have a kit for 08+ STI as the Walbro 255 requires modification to the stock fuel pump housing in order to fit.

      guest56ad69792a8d256e198b66b5 @
      Was this answer helpful?
  • Q: manual  Angelo Junior4 years ago

    This kit comes with a installation manual?
    • 0 of 0 people found the following answer helpful

      A:  No manual is included with this kit, it is essentially a direct replacement of the OEM unit so referring to a factory service manual or enthusiasts manual will be best.

      Nick S. @ RallySport Direct 4 years ago  
      Was this answer helpful?
  • Q: help  03sonicwrx4 years ago

    can i install this on my stock 2003 wrx? even though i dont have any mods yet, will it cause any problems?
  • Q: will this fit my car?  m0nopoly4 years ago

    I have a jdm 97 forester st/b wondering if this is compatible with my car??
    • 0 of 0 people found the following answer helpful

      A:  Unfortunately we can only confirm this to fit with USDM vehicles. It is possible it may fit but we have no guarantees.

      Nick S. @ RallySport Direct 4 years ago  
      Was this answer helpful?