Hey guys, I'm pretty new to these forums and had a question about my z3. Unfortunately, I experienced a "money shift" otherwise known as mechanical over-revving. I am going to try and salvage the car with the current engine, but if that doesn't work I'm going to need to swap. My question is: "What engines can I swap into my car without replacing the transmission or other important components?" will I have to stick with the same 2.5i engine? or can i use the 2.8, 3.0, 3.2, etc I don't necessarily need more power, I just see these engine pop up a lot more.