Koyorad Performance Radiator: Mazda MX-5 Miata NB 1.8L MT 1999-2005

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

Cross Reference

Fitment

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 Coore for availability and shipping estimates.

Coore Performance & Aftermarket is an Authorised Australian Distributor of Koyorad Performance Radiators.
Shop with confidence — all Koyorad products sold through Coore are genuine, backed by manufacturer support, and shipped from Australia.

Browse more Koyorad parts at JDM Mods NQ