look man the z6 came in an American Civic it is .1 liters bigger it has 5 less ponies, you can get a p28 ecu way way cheaper than that and then run a y8 tranny. I think you could do all of that with a clutch, timing belt, thermostat, and water pump for around 800 no problem. I just don't see the point of going d15b. I mean sure you get a little more horspower but not enough to justify not getting the right engine and ecu. This is just my opinion though.