Miata Coolant Inlet Neck For No AC

This water pump inlet neck is made for the NA and NB miata. The neck shape is matched to the water pump inlet unlike the factory part, so make sure you buy the square gasket instead of the standard round one. The main benefits of this neck are the smaller size, the fact it does not run along the side of the engine blocking a turbo drain line, and better flow characteristics. The holes are to be taped for 3/8th npt to run to the heater core and 1/8th npt for the turbo coolant return line.