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  • Performance Koyo Radiator, Nissan 350Z (VQ35DE), 03-06, 48mm, (KH021568)
Performance Koyo Radiator, Nissan 350Z (VQ35DE), 03-06, 48mm, (KH021568)
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Performance Koyo Radiator, Nissan 350Z (VQ35DE), 03-06, 48mm, (KH021568)

KOYO-KH021568
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$572.06
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$572.06
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Performance Koyo Radiator, Nissan 350Z (VQ35DE), 03-06, 48mm, (KH021568)
Description

Performance Koyo Radiator for Nissan 350Z, 48mm HH Series (KH021568)

The Performance Koyo Radiator for Nissan 350Z (KH021568) is a high-performance, direct-fit cooling upgrade for VQ35DE-powered Z33 models. Built to handle New Zealand’s tough road conditions and demanding driving styles, this Koyo 350Z radiator features a 48mm HH Series core with ultra-dense fin layout for maximum cooling efficiency—ideal for spirited driving, track days, or turbo builds.

Manufactured in Koyorad’s own Japanese factories, this Koyo 350Z radiator is Nocolok brazed, hand TIG-welded, and assembled using high-grade aluminium for exceptional strength and thermal conductivity. With a direct OE-fit design, it bolts in without the need for any mods and includes an integrated 1/8” NPT sensor port (plug supplied) for aftermarket temperature gauges—perfect for performance-focused setups.

The 350Z’s V6 powerplant can generate serious heat under load, but this Koyo 350Z radiator is built to take it. With precise tube and fin alignment, a billet filler neck, and application-specific mounting points, it’s an ideal choice for Kiwi Z enthusiasts chasing reliability and performance in one sleek package.

Features and Benefits

48mm HH Series Core – Ultra-high fin density core maximises cooling under load for street or circuit use.

All-Aluminium Construction – Lightweight and corrosion-resistant with superior heat dissipation.

Nocolok Brazed & Hand TIG-Welded – Strong, vibration-resistant welds built to handle NZ’s road conditions.

1/8” NPT Sensor Port (Plug Included) – Ready for temp sensor installation to support aftermarket gauges.

Direct OE Fitment – Installs easily with no modifications needed, retaining stock fan mounts and hoses.

Billet Filler Neck – Ensures better sealing and long-term durability.

Precise Tube & Fin Design – Delivers optimal coolant flow and consistent temperature regulation.

Technical Specifications

Feature Specification
Part Number KOYO-KH021568 (International), KOYO-HH021568 (Koyorad USA)
OEM Cross-Reference 21410 CD010
Core Thickness 48mm HH Series
Construction All-Aluminium, Nocolok Brazed, Hand TIG-Welded
Filler Neck Billet Aluminium
Sensor Port 1/8” NPT Female (Plug Supplied)
Mounting OE-Specific Fan Shroud and Hose Mounts
Fitment 2003–2006 Nissan 350Z Z33 (VQ35DE Only)
Transmission Note Automatic models require external transmission cooler
Warranty Manufacturer’s Warranty

REVIEWS

C.W.
Upgraded to this Koyo 350Z radiator for peace of mind on my turbo 350Z build. Install was a breeze, and coolant temps are now rock steady—even during mountain runs up the Coromandel. Worth every dollar.

Caleb W.
Hamilton, WKO
★★★★★

J.M.
Fitted this into my ’04 Z and couldn’t be happier. Build quality is next level, and I love that it came with a sensor port—great for my aftermarket temp gauge setup. No issues on long drives or during pulls.

Jessie M.
Christchurch, CAN
★★★★★

 

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