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CSF OEM Replacement Radiator - Subaru WRX 2003-2007
CSF OEM Replacement Radiator - Subaru WRX 2003-2007
CSF OEM Replacement Radiator - Subaru WRX 2003-2007
CSF OEM Replacement Radiator - Subaru WRX 2003-2007
CSF OEM Replacement Radiator - Subaru WRX 2003-2007

CSF OEM Replacement Radiator

Subaru WRX 2003-2007

Was: $101.64
You save:

Product will ship from manufacturer, average time to ship: 17 business days
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Features & Product Details

RallySport Direct carries a great selection of quality radiator replacements brought to you by CSF Radiators. 

This is the CSF OEM Replacement Radiator. This radiator has been crafted to meet or exceed the demands of OEM quality to give you OEM performance without paying OEM dealer costs. 



  • OEM size and dimensions
  • Direct replacement without any additional modification or alterations for fitment
  • OE coolant compliant to avoid chemical reactions and catastrophic failure
  • Superior engineering and construction for rugged and heavy-duty use
  • Thru Pipe Design on-hose connections to prevent premature failures
  • Ribbed tanks for added strength and durability
  • Polished filler neck
  • NOTE: This radiator will not fit on 02-03 models built before 07/2002 that are not equipped with a radiator cap
  • Product Video


    Brand: CSF
    Core Depth: 0.94 in
    Core End Tank Material: Plastic
    Core Height: 13.375 in
    Core Width: 27.19 in
    Includes Radiator Cap: No
    Mfgr. Warranty: Limited Lifetime
    Condition: New Product
    Return Policy:



    7 Reviews
    5 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    No user media. You can upload a photo or video of your install by posting a review.
    Automatic Radiator 1 year ago
    5out of 5stars
    They never specified that this radiator was for an automatic transmission Impreza but honestly I should have known by the photo. It has two transmission cooler lines which the manual transmission doesn't use so I had to run to the parts store and get 11 inches of 3/8th inch radiator hose and hose clamps to route them together. It's only been 2 days since install but so far things seem to be holding together and the temp holds a solid 180-186 while driving and 190-196 at idle. Only 'issue' I've found is that the radiator cap seems to get caught up on the fill hole but it's whatever.
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    Excellent  1 year ago
    5out of 5stars
    Perfect fit! Easy install
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    2.5i fitment 2 years ago
    5out of 5stars
    I do work on my own car and I rate this a 3/10 difficulty. The hardest part was reusing the damn spring clamps on the lower radiator hose. Fit like a glove for my 2007 2.5i Impreza. Running highway and city with AC on and 90°F outside. Coolant staying between 194°F and 203°F. Remember to drain coolant from the block too not just the radiator!!! Well worth the $91 price tag despite slight tweaking. OEM radiator cap fits perfect. I have the orange universal spill proof funnel set from Amazon. It fits the OEM radiator perfect with the 'green' attachments, but I needed to mis-match the pieces on purpose and add layers of electrical tape to get the funnel to seal on the CSF radiator. The inside of the filler neck is just different. (Blue insert wrapped in tape, green 'cap', if it helps anybody). Had to reuse lower radiator hose as the gates was too short. (Maybe it only fits WRX) Upper gates hose fit great, but leave it in the sun to soften it up if you're using OEM spring clamps it's a little bit thicker. I think the two metal flanges at the bottom are for transmission cooling. I ran a hose/clamps from one to the other to seal it off cuz the 2.5i doesn't use them. Forgot to pour distilled water into it to see if it was even connected to the rest of the radiator. 1 plastic flange at top of radiator corner passenger side. Can't tell if it's sealed or not or just another vacuum hole for the WRX. Sealed off with small piece of hose folded over and clamped.
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    Perfect fit OEM radiator 4 years ago
    5out of 5stars
    Went in smoothly and everything fits like a glove. It does fit both AT and MT.
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    OEM replacement radiator for 02-07 wrx 4 years ago
    5out of 5stars
    This radiator was so close to OEM specs it should be considered original. Everything fit up and went on and together extremely smooth. 10 out of 10 will buy again(hope I do t have to)
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    • Q: Replacement of radiator without fill cap   Warren h2 years ago

      Do I need to buy anything else, my rad has no cap and I was wondering if it’ll still drop in with nothing else required
    • Q: 2.5i  Casey3 years ago

      Will this radiator fit an 06 2.5i? I know there are a lot of differences between a 2.5i and a WRX,
    • Q: Fitment  bry8314 years ago

      WILL IT FIT BOTH 03 and 08?
    • Q: Automaic or manual  Ethan Her4 years ago

      Does this replacement radiator fit a Manual 04 wrx? It doesn't clarify.