tech section. Member WazTTed said they may be 2510s Here is the link, with pictures to show that those turbos look a lot like the one you've posted.http://twinturbo.net/nissan/300zx/forums/technical/view/1073218/How-to-ID-GT2530s.html Also, they have the same casting numbers on the turbine side suggesting that they are the same turbos, or at least on the turbine side only.
1990 Nissan 300ZX 1982 Datsun 200SX Cardomain website
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