Koyo N-FLO Dual Pass Performance Radiator - Mazda RX-7 (FD3S) MY93-95

Koyorad built its N-FLO Dual Pass technology for exactly this kind of thermally demanding application. The Mazda RX-7 runs a sequential twin turbo rotary in a tightly packaged bay, and the factory cooling system is quickly overwhelmed once boost or track use increases. This radiator uses precision welded aluminium partitions in the upper and lower tanks to force coolant through a double pass path, holding it in the core longer for greater heat rejection than a standard single pass design.

This listing covers the Mazda RX-7 FD3S Series 6 13B-REW 1.3L twin turbo, manual transmission only, built between 1993 and 1995. It's a direct bolt-in unit, SKU HH060644N (also referenced as KH060644NU06), retaining OEM fan shroud mounts and stock hose fitment with no engine bay modifications required.

Note: Manual transmission fitment only — this radiator does not suit automatic FD3S variants.

Specifications

• Core type: N-FLO Dual Pass
• Core thickness: 48mm
• Core dimensions (H x W): 313 x 609/629mm
• Tube pitch: 55/55 x 647mm
• Inlet/outlet diameter: 38mm (top and bottom)
• Construction: all aluminium, Nocolok furnace brazed, hand TIG welded
• Filler neck: precision machined billet
• Fan shroud: retains OEM mounting points
• Hoses: compatible with stock radiator hoses
• Testing: triple pressure tested

Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm your RX-7's build date and transmission type before ordering.

Not sure if this radiator suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.