Koyorad Performance Radiator for Nissan Skyline R33 RB25DET / RB26DETT MT 1993-1999
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Description
Koyo Performance Radiator – Nissan Skyline R33 RB25DET / RB26DETT MT 1993–1999
Application: Nissan Skyline | E-HCR33 (GTS25-T) & E-BCNR33 (GT-R) | RB25DET & RB26DETT Turbo Petrol RWD | Manual Transmission
Part Number: HH020442 / KH020442
⚠️ Note: This radiator does NOT fit the Nissan Skyline R34 GT-R (BNR34). Please ensure you select the correct part for your chassis.
The R33 Skyline is a genuine icon — whether it's the GTS25-T with its RB25DET or the legendary GT-R with the RB26DETT twin-turbo inline-six. Both engines generate serious heat under hard driving, and the factory cooling system has its limits when you're pushing boost on track or in spirited street use.
Koyorad's all-aluminium radiator is a direct bolt-in performance upgrade for the R33, 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 | HH020442 / KH020442 |
| Core Thickness | 48mm |
| Core Dimensions (H × W) | 400 × 643/671mm |
| Tube Pitch | 55/55 × 670mm |
| Inlet / Outlet Diameter | Ø35mm (top & bottom) |
| Drain Plug | M16 |
| 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 | HH020442 / KH020442 |
| Nissan OEM | 21410 15U00 |
Fitment
| Year | Make | Model | Chassis | Submodel |
|---|---|---|---|---|
| 1993–1998 | Nissan | Skyline | E-HCR33 (4D Sedan / 2D Coupe) | GTS25-T – RB25DET 2.5L Turbo Petrol RWD |
| 1995–1999 | Nissan | Skyline | E-BCNR33 (2D Coupe) | GT-R – RB26DETT 2.6L Twin Turbo Petrol AWD (206kW) |
❌ Does NOT fit: Nissan Skyline R34 GT-R (BNR34). A separate Koyorad part number is required for the R34 GT-R.
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.