si transmission

I'm really trying to get the hang of searching this forum before putting up new threads, but what I want to find out is if there is a Si trans that will bolt up to the d16y8, a couple of other post I read stated that the stock s40 will not cut it with high hp. I'm trying to find a good match so...

Okay let me first say I have a 1990 Honda Civic Hatchback not the Si. I want to swap my 4speed transmission (stock) with a 5 Speed Si Transmission out of an 89-91 Si civic. Will it bolt right up or do I need new axles and Hubs. Thanks.

I have three transmissions for sale. 2 SI gear boxes. Both need bearings, but everything else looks good on the inside. The ZC box is in great condition. I have driven it for a year, the guts are in great shape. I pulled it apart to check it out before I put it in the car. Have the...