Koyorad: Alloy Radiator: MAZDA Savanna / RX-7 FC3S 89-91 (53mm Core)
Enhance your Mazda Savanna/RX‑7 FC3S (1989–1991, manual transmission) with the Koyorad KL060643N 53 mm Alloy Radiator. This high-performance radiator features a thick 48–53 mm HH-Series Hyper core with N‑Flo dual/triple-pass coolant routing, enabling superior heat dissipation during daily driving and track sessions. Crafted from all-aluminum, it’s precision TIG-welded and Nocolok-brazed, offering durability and leak-free performance. The direct-fit design retains factory fan shrouds, hoses, and mounts—requiring only minor trim if using the OEM intake snorkel—and includes a billet filler neck and 1/8″ sensor port. With roughly 35% more cooling capacity over stock units, this radiator is the ultimate plug-and-play upgrade for rotary engine reliability.
USA Part Nos.: N/A
OEM Part Nos: N/A
Car Models: Savanna / RX-7 FC 1.3 01/89-
Engine code(s): 13B-T
Diagrams:
Koyorad Code Notes
KS* 25mm core thickness, 1 row
KV* 36mm core thickness, 2 row
KH* 48mm core thickness, 2 row
KL* 53mm core thickness, 2 row
V / U06* at the end = deviation from OE
R* at the end = widerfin pitch
N* at the end = N flow, a partition in the tank to create N shape coolant flow for better cooling efficiency, triple pass
Material is Full Aluminum
Transmission - ALL MT type (No oil cooler), except for models with w/ OC indication. AT needs external oilcooler.
Fillerneck - All radiators with fillerneck are excl caps, these require the old system caps.
Please note that all cross references information are subject to errors and changes. Stock Images Used. Actual Product May Vary.