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Koyo Performance Radiator – BMW M3 / M4 (F80/F82/F83) 2015–2020 / M2 Competition (F87) 2019–2020
Application: BMW M3 (F80) / M4 (F82/F83) / M2 Competition (F87) | S55B30T0 3.0L Twin-Turbo Inline-6 | Manual & M-DCT
Part Number: VH423704 / KL423704
The F80 M3, F82/F83 M4, and F87 M2 Competition are the definitive driver's BMWs of their generation — built around the S55B30T0 twin-turbocharged straight-six, a high-revving, high-output engine that generates serious heat under sustained performance driving. Whether it's a track day weapon, a spirited street car, or a dedicated circuit build, keeping coolant temperatures stable is critical to protecting the S55 and maintaining consistent power output.
Koyorad's all-aluminium radiator is a direct bolt-in performance upgrade for the F80/F82/F83/F87 platform, 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 | VH423704 / KL423704 |
| Core Thickness | 53mm |
| Core Dimensions (H x W) | 535 x 416/426mm |
| Tube Pitch | 60/60 x 432mm |
| Construction | All Aluminium, Nocolok Brazed, Heliarc Welded |
| Transmission | Manual & M-DCT |
| Fan Shroud | Retains OEM mounts |
| Hoses | Compatible with stock radiator hoses |
| Fitment | Direct bolt-in, no modifications required |
Cross Reference
| Koyorad | VH423704 / KL423704 |
| BMW OEM | 1711 2 284 608 |
| CSF | CSF 8075 |
Fitment
| Year | Make | Model | Chassis | Submodel |
|---|---|---|---|---|
| 2015–2020 | BMW | M3 | F80 (4D Sedan) | S55B30T0 3.0L Twin-Turbo Inline-6 |
| 2015–2020 | BMW | M4 | F82 (2D Coupe) | S55B30T0 3.0L Twin-Turbo Inline-6 |
| 2015–2020 | BMW | M4 | F83 (2D Convertible) | S55B30T0 3.0L Twin-Turbo Inline-6 |
| 2019–2020 | BMW | M2 Competition | F87 (2D Coupe) | S55B30T0 3.0L Twin-Turbo Inline-6 |
Sold individually. Lead times may apply — contact us at Coore for availability and shipping estimates. Due August 2026.
Coore Performance and 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.
