The factory water inlet is fine for stock format but runs right under the hot stuff once you go turbo. many people solve this with a mazda 323 water inlet but those are getting hard to find so I made one! optionable with 3 threaded npt fittings. 1/8" NPT forward facing for thermostat crossover 1/4" NPT upward facing for turbo coolant return 1/4" NPT rear facing for heater core If you don't see the combination of fittings that you like please contact us
