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The 99-00 Honda Civic Si came with the B16a2 engine. This is in the USDM (United States Domestic Market). I believe that the SiR was in the JDM (Japanese Domestic Market) and was fitted with a Type-R motor. Gives the car a redline of 9,000rpms over the 8,000rpms the B16a2 is limited to.

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15y ago
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Q: What is the difference 2000 Honda Civic sir and a 2000 civic si?
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