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Doing this off the top of my head, the bronze covered ZC comes from the 3G Civic Si/1G CRX Si and the black-top from the JDM/Aussie 4G Civic Si/2G CRX Si and the Aussie EG Si. It also came out in the JDM/Aussie 1G 'teg... but... there was a lower power twin-carbed version with a gold top that came out in Japan. This is the one that quite often gets sold with the FI equipment bolted on from a blown FI engine and still remains down on power.
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