So I was looking around and thinking to myself. The versa has the MR18, but the Sentra has the MR20 and QR25. But the MR20 is compatible with the Versa and its ECU. Well I was looking and investigating, the computers between the 2.5 and 2.0/1.8 look exactly the same. So correct me if im wrong, but could you do a 2.5 engine swap and 2.5 ECU swap, and shouldnt the ECU just plug and play? As far as engine mounts, the MR20 and QR25 fit in the Sentra, arent they the same mounts? To me this sounds like a no brainer. Not that im saying it can or cant be done, or it isnt or it is worth time or money, but just for the thought of it? Or could the Versa ECU be reflashed with a 2.5 info? As far as trannys, if you have the 6spd, you shouldnt have to change that, right? Id only worry about a CVT. Just food for thought.