This is an RCM block case alloy blanking plug which is used on the EJ series block cases. These are used as gudgeon pin blanking plugs, but can also be used when the oil cooler modine is being deleted. The OE part is prone to rust and corrosion, and isn’t available to buy a replacement. The threaded part of the blank measures 28mm and a genuine Subaru sealing washer is included in the kit. The sealing washer has a in internal diameter of 28.2mm and an external diameter of 33.5mm and is 1.0mm in thickness.
