Spec Miata Cooling System
A. Any radiator may be used, provided it is mounted in the original location, maintains the same plane as the original core and requires no body or structure modifications to install. Any openings created by fitting an alternate radiator shall be blocked to prevent air from entering the engine compartment. The stock cooling fan(s) must be maintained. At least one functional stock OEM cooling fan must be mounted in one of the stock locations.
B. Thermostats may be modified, removed, or replaced.
C. All cars may install the Upper Radiator Seal, p/n NA75-50OK7A
D. A radiator screen of one-fourth (1/4) inch minimum mesh may be added in front of the radiator and contained within the bodywork.
E. The factory air conditioning systems may be removed. Items that serve a dual purpose, such as the alternator/air conditioning compressor bracket, may not be substituted.
F. Engine coolant fluid, coolant/heater hoses and clamps may be substituted. Heater core may be bypassed. It may not be modified or removed. Heater water control valve(s) may be added or substituted.