My friend has wanted a CRX for a while, of course he really wants an Si. We found a pretty good looking 90 HF for a decent price, and we're planning to swap in an A6. I was wondering if the axles will fit the Si tranny as well, we're getting that with the A6, so are the HF hubs the same? We will be getting the motor, tranny, and ECU (thanks d16z6rex). I know the cat will need to be relocated as well, can we just cut the stock HF cat out and move it to the Si location? Is there anything else we will need?