I have a 97 Honda Civic Ex engine Swap from a 99 to 2000 honda Si?

I would like to know if i can fit a b16a2 i believe? Engine to my 97 civic without any modifications? Because i just want to take out the current engine and place the SI engine in a quick simple manner.

Hi so since 1985 it was the first thing you would not be able to do changing the engine. Requires it's own engine management system designed to work with the engine it was designed for.

"Without any modifications"?

What planet did you come from?