Koyorad Performance Radiator for BMW M3 / M4 F80 / F82 / F83 2015-2020 / M2 Competition F87 2019-2020
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Description
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: KV423704 / 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 iilumolab for availability and shipping estimates. Due August 2026.
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.