b16a3 came in the 99 si civics, on worldpac parts catalogue, they call it a "spool valve strainer w/ gasket" (or something similar) because it has a metal strainer in the oil feed. there is another spool valve gasket that goes between two parts of the solenoid, not the solenoid to head. i have replaced a few of these lately on an obd1 b18c and a 99 b16a3. i have to agree with punkr6, they looked exactly the same to me.
the cam plugs that i replaced at the same time though, looked different, but im sure they'd interchange.
the big one goes between the cylinder head and the solenoid itself.
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