Koyo All-Aluminum Racing Radiator – 1993–1995 Mazda RX-7 FD3S | 13B-REW Twin Turbo

Keep your FD3S RX-7's 13B-REW twin-turbo rotary running at optimal temperature with the Koyo All-Aluminum Racing Radiator. Replacing the factory copper/brass radiator with Koyo's full aluminum construction delivers improved heat transfer, reduced weight, and increased cooling capacity — an essential upgrade for any FD RX-7 running stock power or modified, particularly in track, spirited street, or warm-climate use where the 13B-REW's heat output demands reliable cooling performance.

Key Features

• All-Aluminum Construction: Full aluminum core and tanks — superior heat transfer compared to OEM copper/brass construction, lighter weight, and excellent long-term durability
• Improved Cooling Capacity: Increased cooling capacity over the factory RX-7 radiator — a meaningful upgrade for any FD3S running at elevated coolant temperatures or in demanding conditions
• Direct Fit: Engineered specifically for the 1993–1995 Mazda RX-7 FD3S — uses OEM mounting points and hose connections for a straightforward installation
• Koyo Quality: Manufactured by Koyo — a globally recognized OEM and performance cooling supplier trusted by enthusiasts and professional race teams worldwide

Specifications

• Type: All-Aluminum Racing Radiator
• Material: All Aluminum
• Fitment: 1993–1995 Mazda RX-7 FD3S — 13B-REW 1.3L Twin Turbo Rotary
• Part Number: HH060644

Note: This is the standard single-pass aluminum radiator (HH060644). For the N-FLO dual-pass version, see HH060644N. Verify fitment for your specific FD3S build before ordering. A coolant flush and fresh fill is recommended at installation. Professional installation recommended.