Koyorad Performance Radiator for Mazda MX-5 Miata NB 1.8L MT 1999-2005
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Description
Koyo Performance Radiator – Mazda MX-5 / Miata / Roadster (NB) 1997–2005
Application: Mazda MX-5 / Miata / Roadster | NB (1997–2005) | 1.6L & 1.8L Aspirated & Turbo Petrol RWD | Manual Transmission Only
Part Number: VH060650 / KV060650
The NB MX-5 refined everything that made the NA great — sharper, more refined, and just as rewarding to drive hard. But like its predecessor, the factory cooling system has its limits when the heat really builds. Koyorad's Hyper V-Core 36mm Series radiator was engineered for exactly this: tight engine bays, high heat cycles, and factory inlet/outlet positions that rule out a conventional N-FLO design.
The Hyper V-Core's precision fin and tube pitch dramatically increases surface area without choking airflow — keeping coolant temps in check on track, on the mountain, or in summer traffic. It's a direct bolt-in replacement that retains all OEM fan shroud mounts and stock hose connections for a clean, straightforward install.
Also fits the Mazdaspeed MX-5 Turbo — one of the few radiators that handles the added heat load of the factory turbo application without compromise.
Every Koyorad All Aluminium Racing Radiator is Nocolok furnace brazed, precision TIG welded by hand, and triple pressure tested before leaving the factory.
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 | VH060650 / KV060650 |
| Core Type | Hyper V-Core |
| Core Thickness | 36mm |
| Core Dimensions (H × W) | 320 × 643/667mm |
| Tube Pitch | 43/43 × 669mm |
| Inlet / Outlet Diameter | Ø32mm (top & bottom) |
| Rows | 2-Row, High Density 36mm |
| Construction | All Aluminium, Nocolok Brazed, Heliarc Welded |
| Transmission | Manual (MT) Only |
| Fan Shroud | Retains OEM mounts |
| Hoses | Compatible with stock radiator hoses |
| Fitment | Direct bolt-in, no modifications required |
Cross Reference
| Koyorad | VH060650 / KV060650 |
| Mazda OEM | BP4W 15 200A / BP5A 15 200 |
Fitment
| Year | Make | Model | Chassis | Submodel |
|---|---|---|---|---|
| 1998–2000 | Mazda | MX-5 | NB (2D Roadster) | Base – BPZE 1.8L Aspirated Petrol RWD (106kW) |
| 2000–2002 | Mazda | MX-5 | NB (2D Roadster) | Base – BPVE 1.8L Aspirated Petrol RWD (113kW) |
| 2002–2005 | Mazda | MX-5 | NB (2D Roadster) | Base – BPVE 1.8L Aspirated Petrol RWD (107kW) |
| 2004–2005 | Mazda | MX-5 | NB (2D Roadster) | SE – BPV 1.8L Turbo Petrol RWD (121kW) |
| 2002–2003 | Mazda | MX-5 | NB (2D Roadster) | SP – BPVET 1.8L Turbo Petrol RWD (150kW) |
Installation Note: Air conditioning on some NB models may have been installed at the port of entry. Minor adjustment of the condenser mounts may be necessary to avoid contact with this radiator. Take care during installation to avoid damage to the radiator core.
Sold individually. Manual transmission fitment only. Also fits Mazdaspeed MX-5 Turbo. 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.