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Heating and Cooling› Radiators

Koyorad

HH Series 48mm Hyper Core Aluminum Racing Radiator

$556.60 $361.76 Save $194.84

SKU: R020442

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Koyorad HH Series radiator is a direct-fit performance replacement for your stock OE radiator. It is constructed from aircraft-quality aluminum with a 48mm "HH" Series core featuring ultra-high fin density for maximum heat transfer. The core is Nocolok-brazed and TIG-welded for durability.
Show original supplier description
The Koyorad HH Series radiator is engineered for enhanced cooling performance in Nissan Skyline GT-R and GT-S 95-98 R33 models. Its 48mm hyper core features an ultra-high fin density, meticulously designed to maximize heat transfer and dissipate heat more effectively than stock radiators. Constructed with premium materials, this all-aluminum radiator core is hand-assembled and features Nocolok-R brazing and TIG welding for superior durability and reliability. Koyorad oversees production in its privately owned factories to ensure quality is never compromised for quantity. The radiator is designed as a direct-fit, OE-specific replacement, ensuring a quick and simple installation without the need for modifications. It also includes a 1/8” NPT female accessory fitting, complete with a threaded plug, to accommodate aftermarket temperature sensors for monitoring. The precise tube and fin alignment, along with a billet aluminum filler neck, contribute to its overall performance and longevity. Compatible with RB25DET and RB26DETT engines across the 1995-1998 model years for the Nissan Skyline 2-door, this radiator is a crucial upgrade for maintaining optimal engine temperatures under demanding conditions.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandKoyorad
Part NumberR020442
CategoryHeating and Cooling
5,000+ Trusted brands
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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