The Koyorad Sub027PACMK radiator steps in when the factory unit on a Forester XT or WRX starts to struggle, with a core measuring 342 mm high and 686 mm wide to keep the 2.5 L turbo happy. You get a direct-fit style layout for 08/2008–12/2012 Forester XT and 04/2010-on WRX M/T setups, so the 39 mm inlet and outlet line up with your existing hoses when you are loaded up for a trip.

The core thickness sits at 25 mm, which gives a solid balance of airflow and coolant volume when you are towing or climbing long hills in 40 °C summer heat. A 13 mm breather fitting hooks straight to the overflow line, and the built-in transmission cooler section is ready for compatible driveline layouts. It is straightforward gear with sizing that matches the Subaru mounts, so you can fit it once and get out there again.

• Suits Subaru Forester XT 2.5L Turbo 08/2008–12/2012
• Also suits Subaru WRX Turbo M/T from 04/2010-on
• Core height of 342 mm for correct shroud coverage
• Core width of 686 mm to match standard mounting points
• Core thickness of 25 mm for balanced cooling performance
• 39 mm inlet diameter to pair with factory upper hose
• 39 mm outlet diameter for direct connection to lower hose
• 13 mm breather fitting for overflow line compatibility
• Integrated transmission cooler section for specified layouts
• Supplied as a complete radiator assembly only

Q: Will this Koyorad radiator fit an automatic Subaru Forester XT?

This radiator is listed for manual transmission applications only. The end tank and integrated cooler layout on automatic models can differ, which affects line connections and mounting. Always check the transmission type on the compliance plate before ordering. If your Forester XT is an automatic, you will need the specific auto-compatible part number.

Q: How can I confirm this radiator matches my existing unit?

Measure your current radiator core height and width and compare them to 342 mm high and 686 mm wide. Also confirm the inlet and outlet neck diameters are 39 mm each and that you have a single 13 mm breather fitting. Matching these key measurements gives a strong indication the radiator will align with your shrouds, hoses and mounts.

Q: Does this radiator come with a radiator cap or hoses?

No, this radiator is supplied as a bare assembly without cap, hoses or clamps. You can reuse your existing hardware if it is in good condition or replace it with new components. Fresh hoses and clamps are worth considering if the originals are more than a few years old. This helps keep the cooling system reliable after the swap.

Q: Is there an integrated transmission cooler in this radiator?

Yes, the specification lists an integrated transmission cooler section. This section is built into the tank and is intended for compatible transmission layouts within the listed Subaru models. Always inspect the cooler ports and match them to your current line style before installation. A cooling system specialist can help if you are unsure about line routing.

Suitable for Subaru Forester XT 2.5L Turbo built from 08/2008 to 12/2012 with manual transmission.

Also suits Subaru WRX Turbo with manual transmission from 04/2010 onwards.

Confirm existing radiator core height of 342 mm and width of 686 mm before installation.

Re-use factory hoses sized to 39 mm inlet and outlet where condition allows.