Koyo HH010681 HH Series All Aluminum Racing Radiator - 48mm

The Koyo HH010681 is a high-performance all-aluminum racing radiator featuring Koyorad's advanced 48mm "HH" Series Hyper Core design. This radiator core utilizes ultra-high fin density to maximize heat transfer and cooling efficiency, making it ideal for high-performance and racing applications. Engineered as a direct-fit replacement for OE plastic/aluminum radiators, it installs quickly with no modifications required.

Each Koyo radiator is precision-manufactured in Koyorad's privately owned factories in Japan, where quality control is maintained at every stage of production. The all-aluminum core is hand-assembled and Nocolok-R brazed, then TIG welded by hand using premium aluminum materials. The radiator includes a 1/8" NPT female accessory fitting (supplied with threaded plug) for easy installation of aftermarket temperature sensors and gauges.

Key Features:

• 48mm HH Series Hyper Core with ultra-high fin density for maximum heat dissipation
• 100% all-aluminum construction for superior cooling and weight reduction
• Direct-fit OE-specific mounting with no modifications required
• Hand-assembled and Nocolok-R brazed core with TIG welded end tanks
• Precision tube and fin alignment for optimal coolant flow
• Billet aluminum filler neck for durability
• 1/8" NPT female accessory fitting for temperature sensor installation
• Manufactured in Japan under strict quality control standards

Koyorad radiators are trusted worldwide for their exceptional build quality and cooling performance in demanding racing and high-performance street applications.