Koyorad Performance Radiator for Subaru Impreza / WRX STI / Legacy / Liberty / XV MT 2008-2021
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Description
Koyo Performance Radiator – Subaru Impreza / WRX STI / Legacy / Liberty / XV MT
Application: Subaru Impreza / WRX STI / Legacy / Liberty / XV | EJ20 / EJ257 / FB20 Petrol AWD | Manual Transmission
Part Number: VH091662 / KV091662
The EJ-series Subaru platform is one of the most popular and enduring performance foundations in the world — from the Impreza and WRX STI to the Legacy/Liberty GT and XV. Whether it's a street build, a rally car, or a track weapon, keeping coolant temperatures stable is fundamental to getting the most out of these turbocharged boxer engines under sustained load.
Koyorad's all-aluminium radiator is a direct bolt-in performance upgrade across the GH8, GRB, BL5, BP5, VAB, and G-series platforms, engineered to the same factory fit and mounting points as the OE unit. Nocolok furnace brazed, precision TIG welded by hand, and triple pressure tested — it retains all OEM fan shroud mounts and stock hose connections with no modifications required.
Why Koyorad?
- Precise Tube & Fin Alignment — Strict quality control ensures optimal coolant flow and maximum heat transfer efficiency across the entire core.
- Nocolok Furnace Brazing — All tubes, fins, headers, and brackets are bonded in a state-of-the-art Nocolok furnace, creating a structure that resists vibration, road debris, and the elements.
- Billet Filler Neck — Precision-machined billet filler necks are fitted to every unit for superior strength, durability, and a reliable seal.
- OE-Specific Mounting — Application-specific mounting points for fan shrouds, inlet/outlet hoses, and top/bottom pins ensure a pain-free, no-modification install.
- Hand-Crafted Heliarc Welds — Each radiator is individually Heliarc welded by hand, creating the strongest possible aluminium-to-aluminium bond across all components.
Specifications
| Part Number | VH091662 / KV091662 |
| Core Thickness | 36mm |
| Core Dimensions (H × W) | 340 × 677/701mm |
| Tube Pitch | 43/43 × 713mm |
| Inlet / Outlet Diameter | Ø38mm (bottom) |
| Construction | All Aluminium, Nocolok Brazed, Heliarc Welded |
| Transmission | Manual (MT) |
| Fan Shroud | Retains OEM mounts |
| Hoses | Compatible with stock radiator hoses |
| Fitment | Direct bolt-in, no modifications required |
Cross Reference
| Koyorad | VH091662 / KV091662 |
| Subaru OEM | 45111 AG010 / 45111 AG011 / 45111 AG030 / 45111 AG031 / 45119 AG010 / 45119 AG030 / 45119 FG010 / 45119 FG030 / 45119 FG050 / 45119 GA010 / 45119 SC010 / 45119 SC090 / 45119 VA000 / 45119 VA010 |
Fitment
| Year | Make | Model | Chassis | Submodel |
|---|---|---|---|---|
| 2003+ | Subaru | Impreza | CBA-GH8 | EJ25 Petrol AWD |
| 2008–2009 | Subaru | Impreza / WRX STI | CBA-GRB | EJ25 Petrol AWD |
| 2003+ | Subaru | Legacy / Liberty | TA-BL5 (4D Sedan) | EJ25 Petrol AWD |
| 2003+ | Subaru | Legacy / Liberty | TA-BP5 (5D Wagon) | EJ20 Petrol AWD |
| 2003+ | Subaru | Legacy / Liberty | UA-BL5 (4D Sedan) | EJ25 Petrol AWD |
| 2003+ | Subaru | Legacy / Liberty | UA-BP5 (5D Wagon) | EJ20 Petrol AWD |
| 2014+ | Subaru | WRX STI | GBA-VAB (4D Sedan) | EJ25 Petrol AWD |
| 2011+ | Subaru | WRX STI | G3 (4D Sedan) | EJ257 2.5L Turbo Petrol AWD |
| 2011+ | Subaru | XV | G4 (5D Hatch) | FB20 2.0L Petrol AWD |
If you're unsure whether this will fit your vehicle, contact our team of experts via email at hello@iilumolab.com and send through a few photos of the car for us to verify fitment.
Installation Notes
- WRX models with 13mm turbo return pipe: Trim the return pipe as required. The optional coolant port uses an M14-1.25 thread.
- Automatic transmission vehicles: Compatible, however an external transmission oil cooler is required — sold separately.
Sold individually. Manual transmission fitment. Lead times may apply — contact us at iilumolab for availability and shipping estimates.
iilumolab is an Authorised Australian Distributor of Koyorad Performance Radiators.
Shop with confidence — all Koyorad products sold through iilumolab are genuine, backed by manufacturer support, and shipped from Australia.
We always recommend professional fitment for guaranteed satisfaction. If you're wanting a hassle-free installation, feel free to contact our friendly team as we offer installation services in-store at our Melbourne workshop. For more details, contact us here.
Note
Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.