00 Si with D16y8 engine First off, Hi to everyone here. I bought a 2000 Civic coupe for my sixteen year old in February. A young lady had it and was looking to buy a sedan to make hauling the kids around a little easier. She had the car listed as a 2000 Si/ex with 84,000 miles. She went on to descibe the car as a 00 Civic Si body with an ex engine and had a really good price on it. I looked it over and test drove it. It drove good and I saw that it did not have the DOHC engine, but did have a SOHC in it. Well I was in a bit of a rush for a car and bit the bullet. About a month later, the exhaust broke and I had to get it fixed quickly. I crawled under the car and noticed that I did not see a catalytic converter. I went to my shop manual and started researching which I did. My son talked me into getting a new catback system for it and as I started looking into the exhaust diagrams. As it turns out, my car has the d16y7 exhaust manifold. I became very curious as to what I actually had (I thought of it as an ex from the start). I looked up the vin # on the dash. It is an em1. I then looked at the door code. There is a sticker on the fenders, doors and hood that match the vin #. I checked the number stamped on the firerwall and it matched as well. I found the serial number on the block and it says it is a d16y8, but the exhaust was from a d16y7. I never did a Carfax because I don't really care. As I said, I thought of it as an ex anyway and don't feel like I was taken for thinking I was getting an em1. After doing alot of checking, it appears that this car was at one time stolen (my thoughts only) and parts were stripped off of it within the first year. The second owner (the one I bought it from) purchased it in 2001. The engine, gauge cluster, front seats, rear disc brakes, strut tower brace and rear deck lid were taken. I am looking at putting an original b16a engine back in it along with the oem parts that were taken. I've read that in an ek, you will need the motor mounts from a 99-00 Si to do the swap. Questions: 1. Will I need these parts also, or do I have them already since I have a 00 Si already? 2. Were thay taken along with the original motor and replaced with ones from an ex and how would I know? 3. Since they installed an ex motor, the Si motor should hook right up with the wiring harness in it? 4. Do I need to get a new ecu from an Si? 5. Anything I need to know about what engine to buy or look for?