Hello, I recently bought a 1993 318i for $8500. I have many questions about upgrading the engine and doing some unique modifications. I was looking for an M3 engine to swap into my car. What price should I expect and what is a good exhaust system. Can someone explain the how they name the class of car a person has. I just don't understand the E36. What does it stand for. Can someone ellaborate. I will greatly appreciate anyone directly e-mailing me with any helpful tips.