Will a 86 civic si transmission bolt into a 89 integra?

Yes, an '86 Honda Civic Si transmission can be fitted into an '89 Integra, as both vehicles share similar engine and transmission designs due to their Honda lineage. However, some modifications may be necessary to ensure proper alignment and functionality, particularly with mounts and linkage compatibility. It's advisable to verify specific details based on the exact model and engine in each vehicle.