Koyo 2008-2021 WRX/STi / 2005-2009 Legacy GT/Outback XT Radiator

Koyorad VH091662 – Hyper V-Core Aluminum Racing Radiator for Manual Subaru Models (2008–2021 WRX/STI & 2005–2009 Legacy GT/Outback XT)
Upgrade your cooling with the Koyorad VH091662 Hyper V-Core radiator—a high-density, all-aluminum solution built for performance-driven Subaru enthusiasts. Designed for manual-transmission 2008–2021 WRX and STI, plus 2005–2009 Legacy GT and Outback XT, this radiator delivers robust, direct-fit cooling with no cutting or custom mounts required.

Key Features:

• All‑aluminum build (no plastic tanks)—TIG-welded and Nocolok brazed for increased durability under heat and vibration.
• 36 mm Hyper V-Core—enhanced coolant flow and heat dissipation in congested engine bays.
• Factory-fit design—retains OEM fan shrouds, mounts, and entry/exit placement for a plug-and-play upgrade.
• Billet filler neck & drain plug—precision-machined and ready for accessory port installation.
• Optional internal cooler ports—includes fittings or plugs depending on application (e.g. Legacy, Outback, Crosstrek).

Why It’s Better:

Stock plastic-tanked radiators are prone to warping, cracking, and leaks under prolonged stress. The VH091662’s full-aluminum construction resists fatigue, and its superior core keeps temps lower—even when under pressure.

Perfect For:

Street, track, and rally focused WRX/STI builds seeking reliable cooling. Also ideal for Legacy GT & Outback XT owners upgrading from failing OEM radiators.

Fits:

2008-2014 WRX 2.5 H4 Turbo (use included 13mm adapter fitting)
2008-2021 STI 2.5 H4 Turbo (use included 8mm adapter fitting)
2015-2021 WRX 2.0L H4 Turbo (use included plug)
2005-2009, and 2010-2012 Legacy GT MT only including Spec. B (use included plug)
2005-2009 Outback XT MT 2.5L H4 Turbo (use included plug)
2013-2017 Crosstrek 2.0L MT does not have internal transmission cooler (use included plug)

Notes:

• Manual Transmission only.
• STI (8mm pipe), WRX (13mm pipe), Legacy NA &Turbo MT only.
• Optional coolant port has M14-1.25 thread