Do some research, there is such a thing as a D16A (clearly stamped on the block), kind of a rare engine though. Pretty much the same thing as a sohc zc with vtec. It was bought from Japan Direct in Raleigh. From what I found it comes out of the 4WD Civic Feiro (or however you spell it) from Japan. After driving it for a couple days, I must say that I am very impressed with it, compared to what I had. When VTEC engages, it's felt, and heard.