This part converts the rear coolant port on all JZ engines to an AN fitting adapter. The threads are -8 ORB for your convenience. It was designed so you don't have to remove the head to drill and tap the head in order to convert to an AN fitting. Now you can install this part on to the hard pipe on the back of the head while the engine is still in the car and convert to your specified AN size with ease. The part utilizes double o-ring style to seal to the hard pipe coming out of the back of the head on all JZ engines.
It has been pressure tested above 100psi with no issues.
