Koyorad Performance Radiator for Toyota GR Yaris GXPA16 / GR Corolla MZEA12 G16E-GTS MT 2020+
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Description
Koyo Performance Radiator – Toyota GR Yaris GXPA16 / GR Corolla MZEA12 G16E-GTS MT 2020+
Application: Toyota GR Yaris | 4BA-GXPA16 (3D Hatch) | G16E-GTS 1.6L Turbo Petrol AWD | Manual Transmission
Application: Toyota GR Corolla | MZEA12 | G16E-GTS 1.6L Turbo Petrol AWD | Manual Transmission
Part Number: KH013831
The GR Yaris and GR Corolla are two of the most exciting homologation specials in decades — purpose-built rally-derived performance cars sharing Toyota's bespoke G16E-GTS 1.6L three-cylinder turbo and AWD platform. The G16E-GTS is a highly stressed engine that generates serious heat, and with both models increasingly popular on track and in rally events, cooling performance matters.
Koyorad's all-aluminium radiator is a direct bolt-in performance upgrade for both the GXPA16 and MZEA12, 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 | KH013831 |
| Core Thickness | 48mm |
| Core Dimensions (H × W) | 625 × 394/404mm |
| Tube Pitch | 58/58 × 410mm |
| Inlet / Outlet Diameter | Ø35mm (left & right) |
| 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 | KH013831 |
| Toyota OEM | 16400 18050 |
Fitment
| Year | Make | Model | Chassis | Submodel |
|---|---|---|---|---|
| 2020+ | Toyota | GR Yaris | 4BA-GXPA16 (3D Hatch) | GR – G16E-GTS 1.6L Turbo Petrol AWD (200kW) |
| 2022+ | Toyota | GR Corolla | MZEA12 | GR – G16E-GTS 1.6L Turbo Petrol AWD (224kW) |
Sold individually. Manual transmission fitment only. 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.
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
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.