Koyorad Racing Aluminium Radiator | Nissan 350Z Z33 | VQ35DE (2003|2006)

The Koyo Aluminium Racing Radiator is a direct-fit upgrade for your Z33 350Z, built to keep the VQ35DE cool through spirited driving, track days and grip events. 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. Designed for manual-transmission cars.

Factory Radiators Weren't Built for This

Plastic-tank OEM radiators were designed for daily driving, not repeated hard runs. Push a Z33 on track or in traffic on a hot day and heat soak creeps in fast | rising coolant temps, fading power, and long-term stress on tanks and seams that were never built to handle it.

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.

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 350Z | 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