Koyorad Aluminium Racing Radiator | Nissan Skyline R33 GTS-T | RB25DET (1993|1998)

The Koyo Aluminium Racing Radiator is a direct-fit upgrade for your R33 Skyline, built to keep the RB25DET cool whether you're grip-hunting on track, drifting, or building a serious street car. Hand-TIG-welded in Japan from all-aluminium construction, it drops straight into the factory mounting points for a clean, no-fuss install with a serious step up in cooling performance.

A Legendary Six Deserves Better Than a 30-Year-Old Radiator

Factory plastic-tank radiators on an R33 are now decades old, and age, vibration and heat-cycling take a toll long before the engine does. Add turbo boost or a hard track session and a tired factory radiator becomes the weak link.

A Cooling System Built for Real Punishment

Koyo's 48mm core is engineered with optimised fin density and tube design to move more heat out of the system, backed by a full-aluminium, TIG-welded build that shrugs off the vibration and heat-cycling that kills OEM plastic tanks over time. Every unit is pressure-tested before it leaves the factory. Note: automatic-transmission cars will need an external transmission cooler, as this radiator does not include a built-in trans cooler.

Cooler Coolant, More Confidence on Track

With stable coolant temps locked in, you get consistent power lap after lap, less risk of overheating on hot laps or in traffic, and a radiator tough enough to handle whatever's next for your Skyline | more boost, more track days, more seat time.

Key Features

• All-aluminium construction with TIG-welded tanks for maximum durability
• 48mm core for increased cooling capacity over the factory unit
• Optimised fin density and tube design for efficient heat transfer
• Direct-fit design | uses factory mounting points and fan shroud, no modifications required
• Compatible with standard radiator caps and coolant hoses (unless otherwise specified)
• Pressure-tested for reliability under sustained high load and temperature
• Ideal foundation for further performance upgrades, including higher boost levels and track use
• Made in Japan

Specifications