Hey I'm new around here and to BMW's, I'm looking for a new weekend car for around $20,000 and I'm considering a supercharged Z3. The only problem is, I can't find Z3 supercharger kits for the 2.5 and 3.0L Z3's, only the Z4's. So my question to you guys, is it the same motor? Or am I looking in the wrong place?