Can you put a Honda integra b16 1st gen in a 91 Honda civic si?

Yes, you can swap a first-generation Honda Integra B16 engine into a 1991 Honda Civic Si. This swap is relatively common among enthusiasts, as both vehicles share similar chassis and engine mounting points. However, it may require some modifications to the wiring harness, engine mounts, and exhaust system to ensure proper fitment and functionality. Make sure to consult specific guides or forums for detailed instructions and compatibility information.