your probably wanting to make the stock motor out of your prelude vtec right? well the B20 vtec motors your hearing about is a B20 out of a crv with a b16 head, or gsr head if you wanted. the motors are a little different. im not too sure what the difference is, just thought id let you know you might not get what you expect out of it. and if your going to do that, you should probably get a b16 tranny too. just my opinion.