48mm Core Thickness
Built with a robust 48mm core, it is engineered for the serious performance tuner. Increased capacity means better cooling reserve when you need it. Intended for both circuit and daily use, you may double your coolant capacity and see up to 35% increased performance over your stock radiator. Unless noted otherwise, all Koyorad All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the stock fan shrouds and fans. 

Transmission: M/T

Note: LATE FC Series 5 CHASSIS (Naturally Aspirated & TURBO). Use OEM side brackets. OEM brackets are Series 4 or Series 5 specific. Retains use of coolant level sensor provision (top).
Manual Transmission only. Use OEM side brackets. OEM brackets are Series 4 or Series 5 specific. Increased thickness of this high performance core will require some modifications to fit with w/ OEM intake snorkel.

Fitment:
89-92 Mazda RX-7 1.3 Rotary 13B Non-Turbo
89-92 Mazda RX-7 1.3 Rotary 13B Turbo II