PR3-2 can also be ITR head. B16 and ITR/CTR use the same head casting. Yours states 8/9 which is correct in saying it is a 90 SIR B16A head. Having the ITR manifold is deff a plus.
PR3 can also be 1.7 GSR head off a DB2 integra they used the PR3 casting for that also. That's why when you buy a Skunk2 intake manifold B16/B17/B18C(type R) are the same each other LS/B20 are the same each other and GSR has a different bolt pattern that's not compatible with other heads.
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