The head stud washers supplied by ARP in their Z32 300ZX head stud kits have a smaller Outside Diameter than the OEM washer. Common practice is to stack the ARP kit washer on top of the OEM washer to achieve proper load distribution.
Alternatively I offer these Heavy Duty washers from ARP that are the same Outside Diameter as the OEM Z32 300zx head bolt washer. Please note that this listing is to buy the washers separately; if you are also purchasing head studs from my store you can add the washers a little more cheaply than buying the washers separately.
Ships as a set of washers. One set required per vehicle.
Includes delivery to AUS.