Engineered for performance and reliability, the Koyorad KH060644R/HH060644 and HH060644N radiators are premium cooling upgrades designed specifically for the Mazda RX-7 FD3S Turbo 13B-REW with manual transmission. Both models are part of Koyorad’s renowned “HH” Series, offering exceptional heat dissipation and durability for spirited street driving and track use.

Shared Features:

• All-Aluminum Construction: Lightweight and corrosion-resistant for long-lasting performance.
• 48mm Hyper Core: High-density core design increases cooling capacity by over 40% compared to OEM radiators.
• Nocolok™ Brazing & TIG Welding: Ensures structural integrity and leak-free operation.
• Direct OEM Fitment: Compatible with factory fan shrouds, A/C condenser, radiator hoses, and sensors—no modifications required.
• Billet Aluminum Filler Neck: Adds durability and a polished finish.
• Triple Pressure Tested: Guarantees reliability under extreme conditions.

Which One Should You Choose?

• HH060644 is ideal for daily driving and occasional track use, offering a solid upgrade over stock cooling systems.
• HH060644N features a dual-pass N-FLO design, making it ideal for high-performance builds and advanced temperature monitoring - making is perfect for enthusiasts seeking maximum cooling efficiency, especially in high-performance or racing environments.