Koyo OEM Replacement Radiator Manual Transmission

Manufacturer Part # KOY-A2704


MSRP: $140.68

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OEM Replacement Radiator Kit 02-07 WRX/STI ( Part Number:RSD 02-07RADOE)
OEM Replacement Radiator Kit 02-07 WRX/STI
As low as $99.94
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This is Koyo’s OEM replacement radiator for cars with the manual transmission.  Koyo has an outstanding reputation for providing the automotive consumer with a radiator that is reliable, offers optimal cooling, and has factory fit and finish.

These are great for stock cars, to lightly modified. These feature plastic end tanks with an aluminum core.  These are a very cost effective option in comparison to OEM units.

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Brand: Koyo
Core Depth: 1.00 in
Core End Tank Material: Plastic
Core Height: 13.375 in
Core Width: 27.0625 in
Includes Radiator Cap: No

Mfgr. Warranty: 18 Months
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.


Verified Purchase

Good product - One small flaw
GemstoneJames 4 months ago
A great OEM replacement radiator. Easy to install. However, lower drain valve arrived cracked and I had to transfer the old unit to the new radiator. Inspect it before installing!

Verified Purchase

OEM quality and fitment
Tearly 4 months ago
Upper plastic end tank started leaking on my 06 STI. Bought this based on reviews, my car is basically stock so no need for an upgraded radiator. Install was completely straight forward and zero unexpected hassles. Pull the old radiator out, attach the fans and overflow reservoir on to the new replacement and reinstall, refill coolant and done. Took two hours start to finish and I was driving the car again. This radiator is an exact replacement. RSD always does a great job with shipping.
Verified Purchase

Deadkid9110 11 months ago
The previous owner of my car loaded the stock radiator full of Black Pepper, so I decided to replace it with this radiator. Installation was straight forward, fans screwed into place (although I did have to force the holes to line up - minor inconvenience) and radiator bolted directly in place. After properly burping the cooling system, my car runs noticeably cooler. Before, my coolant temperature gauge would be right in the middle of the operating temperature lines. Now it hugs the lower line a little more. Interested to see how it will do on extremely hot days with AC running, but I don't for-see a problem. I gave performance 5 stars because the people who buy this radiator know what they are purchasing (an OEM Replacement). IF you need that "extra" performance, buy accordingly. Highly recommended, and price is spot on!

fits like a stock radiator, in and out no problem
TKEHLENBECK60531 2 years ago
fans fit great, if your looking for stock replacement highly recommend this one. My stock rad lasted 150k hopefully this one will too

Good Product
taylor822 2 years ago
Only issues I had with the install is that the oem fans didn't line up exactly and had to man-handle them to get them to fit. Also didn't mount to the car easily either and it does not sit centered in the top brackets. And ever since I replaced it, had a pretty noticeable burning coolant smell even after a few weeks of having it on.

  • Q: radiator shroud  1flyblobeye 8 months ago


    Will a perrin radiator shroud fit on this radiator?

    • A: They Perrin shroud should fit this radiator.

      Jared A. 8 months ago
Subaru Impreza
WRX STI 2004, 2005, 2006, 2007WRX STI Limited 2007WRX 2003, 2004, 2005, 2006, 2007WRX TR 2006, 2007WRX Limited 2006, 2007
Saab 9-2X
Aero 2005, 2006