To allow easy install of an OBD2 head or engine in an E30 or OBD1 E36, this fitting installs into the OE hard line location of an OBD2 head and leaves a OBD1 male hose-type fitting for reliable and simple fitting of then chassis side early type rubber hose.
-From the factory, OBD2 S52 and M52 heads have a female coolant pipe-line coming out of the head.
-OBD1 E36 and E30 use a male fitting with rubber hose for coolant.
Billet aluminum, anodized black for corrosion resistance and OEM look.
Perfect item to make your engine swap as reliable, easy and clean as possible.