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STI JDM Rear Diffuser (Part Number: )
STI JDM Rear Diffuser (Part Number: )
STI JDM Rear Diffuser (Part Number: )
STI JDM Rear Diffuser (Part Number: )
Community Media
STI JDM Rear Diffuser (Part Number: )
STI JDM Rear Diffuser (Part Number: )
STI JDM Rear Diffuser (Part Number: )
STI JDM Rear Diffuser (Part Number: )
STI JDM Rear Diffuser
Subaru WRX/STI 2002-2007
Read 12 Reviews | 21 Q&As
Part # ST91225FE000
$82.95

In stock! Ships same day

Features & Product Details

The STI Rear Diffuser came standard on the 06-07 USDM STi. It channels the air underneath the car to help with high speed stability. You can either purchase the diffuser alone if your car already came with one from the factory or you can purchase the additional hardware in order to bolt it onto your vehicle, such as the Cusco Diffuser Mount and Hardware.

The hardware you will need when installing this on a WRX or 04-05 STI is as follows:
  • 1x CUS 672 487 S
  • 1x CUS 673 487 A
  • 4x SUB 901000365
  • Specifications

    Brand: STI
    Color: Black
    Installation Location: Rear
    Installation Method: Factory Mounting Hardware
    Material: Plastic
    Mounts To: Chassis
    Mfgr. Warranty: 1 Year
    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

    12 Reviews
    4.9 out of 5 Stars
    5 Stars
    (11)
    4 Stars
    (1)
    3 Stars
    (0)
    2 Stars
    (0)
    1 Stars
    (0)
    Customer Photos and Videos
    STI JDM Rear Diffuser ( Part Number: ST91225FE000)
    STI JDM Rear Diffuser ( Part Number: ST91225FE000)
    STI JDM Rear Diffuser ( Part Number: ST91225FE000)
    STI JDM Rear Diffuser ( Part Number: ST91225FE000)
    1 of 1 people found the following review helpful
     2 years ago
    Anil
      
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    0 of 1 people found the following review helpful
    04 STI 5 years ago
    illysti
    So much easier to order it here, than from the dealer. I did have to trim it a bit to make sure it didnt hit my aftermarket exhaust. Looks great!
      
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    1 of 1 people found the following review helpful
    Looks good 5 years ago
    tim95211
    I admit I bought this mostly for looks, but I got the added benefit of a stiffer rear end with the Cusco rear subframe brace. Pretty good quality and fit is dead on.
      
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    0 of 1 people found the following review helpful
    Looks great! 6 years ago
    bladesti
    Looks great on the car! Love it! Thank you rsd
      
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    0 of 1 people found the following review helpful
    simply awsome 6 years ago
    chrispy bacon
    Once i got the Cusco sub-Frame bar and brackets install, this thing took seconds to install. It just complete the back end. Love it! Thanks RSD !!
      
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    QUESTIONS & ANSWERS

    • Q: Rear diffuser, 2002 wrx wagon  Greg2 years ago

      Will this fit my 2002 wrx wagon??
    • Q: 2005 sti diffuser  Marsden872 years ago

      I want to purchase the diffuser for my 2005 impreza sti; but as you noted, it needs the bolts and frames/mounting plates. Do you sell this as a complete package and how do i ascertain the cost?
      • 0 of 1 people found the following answer helpful

        A:  As noted in the product description: The hardware you will need when installing this on a WRX or 04-05 STI is as follows: 1x CUS 672 487 S 1x CUS 673 487 A 4x SUB 901000365

        Josh P. @ RallySport Direct 2 years ago  
          
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    • Q: Fitment  07RS3 years ago

      What all would it take to get this to fit on a 2007 Impreza?
      • 0 of 1 people found the following answer helpful

        A:  We do not have a confirmed fit for 2007 NA Impreza models and it would likely require custom brackets and installation.

        Nick S. @ RallySport Direct 3 years ago  
          
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    • Q: Suitable for 2006 WRX Wagon  Jackie.C3 years ago

      I would like to know, is it fit for 2006 wrx wagon thx a lot
    • Q: Fitment  Sonic yellow wrx3 years ago

      Will it fit my sonic yellow 03 wrx
      • 1 of 1 people found the following answer helpful

        A:  To allow this product to fit you will need additional hardware, such as the following quantities of each of these part numbers. 1x CUS 672 487 S 1x CUS 673 487 A 4x SUB 901000365

        Nick S. @ RallySport Direct 3 years ago  
          
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      • 0 of 1 people found the following answer helpful

        A:  Can i get the adiditonal hardware on rally sport direct

        Sonic yellow wrx @
          
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